Linux and Termux Cheat Sheet by Ranjit485

Linux Command Cheat Sheet with the most commonly used commands.md

Here’s a Linux Command Cheat Sheet with the most commonly used commands:

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File and Directory Management

Command	Description
ls	List files and directories.
ls -l	Long listing format (detailed view).
ls -a	List all files, including hidden files.
pwd	Print working directory (current location).
cd /path/to/directory	Change directory.
mkdir directory_name	Create a new directory.
rm file_name	Remove a file.
rm -r directory_name	Remove a directory and its contents.
cp source destination	Copy a file or directory.
mv source destination	Move or rename a file or directory.
touch file_name	Create a new empty file.
find /path -name file_name	Search for a file or directory.
tree	Display directories and files in a tree-like structure.

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File Viewing and Editing

Command	Description
cat file_name	Display the contents of a file.
tac file_name	Display the contents of a file in reverse order.
less file_name	View file content one screen at a time.
head file_name	Show the first 10 lines of a file.
tail file_name	Show the last 10 lines of a file.
nano file_name	Open file in the Nano text editor.
vim file_name	Open file in the Vim text editor.
wc file_name	Count lines, words, and characters in a file.
diff file1 file2	Compare two files line by line.
grep "text" file_name	Search for text within a file.

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File Permissions and Ownership

Command	Description
chmod 755 file_name	Change file permissions (rwxr-xr-x).
chown user file_name	Change file ownership to a specific user.
chgrp group file_name	Change group ownership of a file.
ls -l	View file permissions and ownership.

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Process Management

Command	Description
ps	List running processes.
top	Display real-time system resource usage.
htop	Interactive process viewer (requires installation).
kill PID	Kill a process by its Process ID (PID).
killall process_name	Kill all processes with a specific name.
bg	Resume a job in the background.
fg	Bring a job to the foreground.
jobs	List background jobs.

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Disk Usage

Command	Description
df -h	Display disk space usage (human-readable).
du -h	Show directory/file size (human-readable).
du -sh directory_name	Show the total size of a directory.
mount /dev/device /mnt/point	Mount a device to a directory.
umount /mnt/point	Unmount a mounted device.

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Networking

Command	Description
ping domain.com	Check network connectivity to a domain or IP.
curl -I URL	Fetch HTTP headers of a URL.
wget URL	Download a file from the internet.
ifconfig	Display network interfaces (deprecated, use ip).
ip a	Show IP addresses and network interfaces.
netstat -tuln	List open ports and services.
ssh user@host	Connect to a remote server via SSH.

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User Management

Command	Description
whoami	Show the current logged-in user.
who	Show all logged-in users.
adduser username	Add a new user.
passwd username	Change the password for a user.
usermod -aG group username	Add a user to a group.
id username	Show a user's ID, groups, and other details.

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Package Management (Ubuntu/Debian)

Command	Description
sudo apt update	Update package lists.
sudo apt upgrade	Upgrade installed packages.
sudo apt install package_name	Install a package.
sudo apt remove package_name	Remove a package.
dpkg -l	List installed packages.

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System Information

Command	Description
uname -a	Show kernel version and system info.
hostname	Display the system's hostname.
uptime	Show system uptime.
free -h	Display memory usage.
cat /proc/cpuinfo	Show CPU details.
cat /proc/meminfo	Show memory details.

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Archiving and Compression

Command	Description
tar -cvf archive.tar files/	Create a tar archive.
tar -xvf archive.tar	Extract a tar archive.
tar -czvf archive.tar.gz files/	Create a compressed tar.gz archive.
gzip file_name	Compress a file using gzip.
gunzip file_name.gz	Decompress a gzip file.
zip archive.zip files/	Create a zip archive.
unzip archive.zip	Extract a zip archive.

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Permissions Shortcuts

Permission	Symbol	Command Example
Read (r)	4	chmod 400 file_name
Write (w)	2	chmod 200 file_name
Execute (x)	1	chmod 100 file_name
Read/Write/Exec	7	chmod 700 file_name

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Termux Cheat Sheet for sending Discord webhooks and making API calls using curl.md

Here’s a Termux Cheat Sheet for sending Discord webhooks and making API calls using curl:

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General Setup

1. Update and Upgrade Packages:

   pkg update && pkg upgrade

2. Install Necessary Tools:

   pkg install curl jq

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Sending Discord Webhooks

1. Basic Webhook Message

curl -H "Content-Type: application/json" \
-d '{"content":"Your Message Here"}' \
<WEBHOOK_URL>

2. Send a Message with an Embed

curl -H "Content-Type: application/json" \
-d '{
  "content": "Optional plain text message",
  "embeds": [{
    "title": "Embed Title",
    "description": "Embed Description",
    "color": 16711680
  }]
}' \
<WEBHOOK_URL>

• Replace <WEBHOOK_URL> with your Discord webhook URL.
• color is a decimal representation of a hex color (e.g., 0xFF0000 = 16711680 for red).

3. Send a File

curl -F "file=@/path/to/your/file.txt" \
<WEBHOOK_URL>

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API Calls Using curl

1. GET Request

curl -X GET <API_URL>

2. POST Request

curl -X POST -H "Content-Type: application/json" \
-d '{"key":"value"}' \
<API_URL>

3. Headers Example

curl -H "Authorization: Bearer <TOKEN>" \
-H "Content-Type: application/json" \
-X GET <API_URL>

4. Query Parameters

curl "<API_URL>?param1=value1&param2=value2"

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Parse JSON Responses with jq

1. Pretty Print JSON

curl -s <API_URL> | jq

2. Extract Specific Data

curl -s <API_URL> | jq '.key'

3. Extract Nested Data

curl -s <API_URL> | jq '.parentKey.childKey'

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Automate with Shell Scripts

Create a Script:

1. Open a file with a text editor:

   nano webhook.sh

2. Add the script:

   #!/bin/bash
   
   WEBHOOK_URL="<YOUR_DISCORD_WEBHOOK>"
   MESSAGE="Hello from Termux!"
   
   curl -H "Content-Type: application/json" \
   -d "{\"content\":\"$MESSAGE\"}" \
   $WEBHOOK_URL

3. Save and Exit (Ctrl + O, Enter, Ctrl + X).

4. Make it executable:

   chmod +x webhook.sh

5. Run the script:

   ./webhook.sh

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Common Errors and Fixes

1. 403 Forbidden Error:

   • Check your webhook URL or API token.

2. Invalid JSON:

   • Validate your JSON using an online tool like https://jsonlint.com/.

3. Permission Denied:

   • Ensure the script has execute permissions:

     chmod +x script.sh

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Termux cheat sheet.md

Here’s a comprehensive and advanced Termux cheat sheet designed for power users, covering system tasks, development, networking, scripting, hacking tools, and more.

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1. Termux Basics

• Update & Upgrade:

  pkg update && pkg upgrade

• Install a Package:

  pkg install package_name

• Search for a Package:

  pkg search keyword

• Uninstall a Package:

  pkg uninstall package_name

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2. File Management

• List Files with Details:

  ls -lha

• Copy Files:

  cp source destination

• Move/Rename Files:

  mv old_name new_name

• Find Files:

  find / -name "filename"

• Extract Archives:
  • .tar.gz:

    tar -xzvf archive.tar.gz

  • .zip:

    unzip archive.zip

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3. Networking & Internet

• Download Files:

  wget -c URL

• HTTP Requests:

  curl -X GET/POST URL

• Network Tools:
  • Install tools like nmap and ping:

    pkg install nmap
    nmap -A target_ip

  • Check internet speed:

    pkg install speedtest-cli
    speedtest

• SSH into a Remote Server:

  ssh user@host

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4. Scripting and Automation

• Create a Script:

  nano script.sh

• Add Execute Permission:

  chmod +x script.sh

• Run the Script:

  ./script.sh

• Schedule Tasks (Cron Jobs):

  crontab -e

  Example Cron Entry:

  0 5 * * * /data/data/com.termux/files/home/script.sh

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5. Development Tools

• Programming Language Setup:

  • Python:

    pkg install python
    python3 script.py

  • Java:

    pkg install openjdk
    javac Program.java
    java Program

  • Node.js:

    pkg install nodejs
    node script.js

• Version Control (Git):

  • Clone a Repository:

    git clone repo_url

  • Check Status:

    git status

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6. System Monitoring

• System Resources:

  top

• Detailed Monitoring with htop:

  pkg install htop
  htop

• Disk Usage:

  df -h
  du -sh *

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7. Ethical Hacking Tools

Install hacking tools responsibly!

• Metasploit:

  pkg install metasploit
  msfconsole

• SQLMap:

  pkg install sqlmap
  sqlmap -u target_url

• Wireshark CLI:

  pkg install wireshark
  tshark

• John the Ripper:

  pkg install john
  john hashfile

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8. Advanced Termux-Specific Commands

• Clipboard:

  • Copy to clipboard:

    echo "text" | termux-clipboard-set

  • Retrieve clipboard:

    termux-clipboard-get

• Microphone Recording:

  termux-microphone-record -f audio.wav

• Sensor Data:

  termux-sensor -s TYPE

  Example:

  termux-sensor -s accelerometer

• Battery Status:

  termux-battery-status

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9. Package Management & Custom Repositories

• List Installed Packages:

  pkg list-installed

• Backup Installed Packages:

  dpkg --get-selections > backup.txt

• Restore Packages:

  dpkg --set-selections < backup.txt
  apt-get dselect-upgrade

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10. Fun and Miscellaneous

• Matrix Effect:

  pkg install cmatrix
  cmatrix

• Install Figlet for ASCII Art:

  pkg install figlet
  figlet "Hello, Termux!"

• Install Fortune for Quotes:

  pkg install fortune
  fortune

• Combine Fortune with Cowsay:

  pkg install cowsay
  fortune | cowsay

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11. Troubleshooting and Debugging

• Fix Package Issues:

  apt-get --fix-broken install

• Check Logs:

  logcat

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12. Aliases and Customization

• Set an Alias:

  alias ll='ls -la'

• Remove an Alias:

  unalias ll

• Make Aliases Permanent: Edit the .bashrc file:

  nano ~/.bashrc

  Add your aliases, then reload:

  source ~/.bashrc

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This cheat sheet should help you perform advanced tasks in Termux efficiently. For extremely advanced workflows, you can combine scripting, custom tools, and third-party APIs!