# Master the `awk` command with this practical cheatsheet.

# Learn to process text files, select columns,

# filter lines by patterns, and perform calculations in Linux.

# ----- Unleashing `awk`: A Practical Cheatsheet -----

# Print specific columns (fields) from a file or input:

# Fields are separated by spaces/tabs by default. $1=1st, $2=2nd, $0=whole line.

xinit@localhost:~$ ls -l | awk '{print $1, $9}'

# Prints permissions and filename.

# Print col…

# The ultimate cURL cheatsheet for developers and sysadmins.

# Quickly find commands to download files, test REST APIs, send POST/GET requests,

# and set custom headers with practical, copy-paste examples.

# ----- A Practical `curl` Cheatsheet -----

# Simply fetch the content of a URL (GET request):

xinit@localhost:~$ curl https://example.com

# Show detailed info, including response headers (-i):

xinit@localhost:~$ curl -i h…

# A simple Linux I/O redirection cheatsheet. Learn how to redirect

# stdin, stdout, and stderr with practical examples of >, <, |, >>, and 2>.

# Master command chaining and error handling in a copy-paste format.

# ----- Linux I/O Redirection Cheatsheet -----

# Redirect standard output (stdout) to a file:

# WARNING: '>' OVERWRITES the file if it exists!

xinit@localhost:~$ ls -l > files_list.txt

# Redirect stdout and APPEND to a file…

# A practical grep command cheatsheet for Linux. Learn to search files, use

# regular expressions, filter output, and more with easy-to-copy examples.

# ----- Mastering `grep`: Basic Filtering -----

# The most common use: filter output from another command:

# (e.g., find a specific process)

xinit@localhost:~$ ps aux | grep 'nginx'

# Search for a string in a single file (case-sensitive):

xinit@localhost:~$ grep 'error' /var/l…

# A practical guide to killing unresponsive processes in Linux. Learn to use `kill`,

# `killall`, `pkill`, and `fuser` to stop processes by PID, name, or network port.

# ----- Kill by Process ID (PID) - The Classic Way -----

# First, find the Process ID (PID) of your app:

xinit@localhost:~$ ps aux | grep 'my_process'

# Then, kill the process by its PID:

# Sends a "graceful shutdown" signal (SIGTERM 15)

xinit@localhost:~$ kil…

# Go beyond simple file search. Learn how to use the Linux "find" command to locate

# files by name, time, and size, and perform actions like `delete` or `chmod`.

# ----- The Power of `find`: Finding Files -----

# Find files by name (case-sensitive):

xinit@localhost:~$ find /path/to/search -type f -name "myfile.txt"

# Find files by name (case-insensitive):

xinit@localhost:~$ find /path/to/search -type f -iname "myfile.txt"

# A simple, step-by-step cheatsheet to creating, activating, and managing Python

# virtual environments with venv. This guide also educate you how to install PIP packages

# in your virtual environment. Perfect for beginners on Linux, macOS, and Windows.

# ----- Python Virtual Environments (venv) -----

# 1. Install the venv package.

# On Debian/Ubuntu, you may need to install it separately:

xinit@localhost:~$ sudo apt install python3-venv

# On Windows and…

# A step-by-step guide to securing your new VPS.

# Learn how to create a sudo user, disable root login,

# and configure a UFW firewall to protect your server.

# ----- Initial VPS Security Setup -----

# 1. Create a new user and add to SUDO group:

root@localhost:~$ adduser your_new_user

root@localhost:~$ usermod -aG sudo your_new_user

# 2. Lock the root account to disable direct password login:

xinit@localho…

# Mastering SSH from basic login to port forwarding for remote access:

# Learn how to connect to custom SSH port, use identity keys, run remote

# commands, forward ports for database access with these practical examples

# Basic SSH connection:

xinit@localhost:~$ ssh user@remote-address

# Connect with a custom port (e.g., 2222):

xinit@localhost:~$ ssh user@remote-address -p 2222

# Connect using a specific private key:

…