# Linux Command-Line Cheatsheet

• Navigation
• Process Management
• Searching
• Networking
• Compression/Archiving
• System Information
• Package Management (Debian/Ubuntu)
• Install Software Updates and Settings
  • System Settings

# Navigation

Command	Description
cd [directory]	Change directory (~ is home, and / is root directory)
pwd	Print working directory
ls	List files and directories
ls -l	List files in long format
ls -a	List all files, including hidden ones
du -sh	Get size of current directory

# Process Management

Command	Description.
ps	Display running processes
top	Monitor system processes in real-time
kill [PID]	Terminate a process by its process ID
killall [process]	Terminate all processes with a given name

# Searching

Command	Description
grep [pattern] [file]	Search for a pattern in a file
grep -r [pattern] [directory]	Recursively search for a pattern in a directory
find [directory] -name [filename]	Find files/directories by name

# Networking

Command	Description
ifconfig	Display network interfaces and IP addresses
ip addr	Display network interfaces and IP addresses
ping [host]	Send ICMP echo requests to a host
wget [URL]	Download files from the web
ssh [user]@[host]	Connect to a remote host using SSH

# Compression/Archiving

Command	Description
tar -czvf [archive.tar.gz] [directory]	Create a gzip-compressed archive
tar -xzvf [archive.tar.gz]	Extract a gzip-compressed archive
unzip [file.zip]	Unzip a ZIP archive
gzip [file]	Compress a file (creates file.gz)

# System Information

Command	Description
uname -a	Display system information
df -h	Display disk space usage
free -h	Display RAM usage
uptime	Display system uptime
who	Display logged-in users

# Package Management (Debian/Ubuntu)

Command	Description
sudo apt update	Update package lists
sudo apt upgrade	Upgrade installed packages
sudo apt install [package]	Install a package
sudo apt remove [package]	Remove a package
dpkg -i [package.deb]	Install a .deb package

# Install Software Updates and Settings

  # Sync available packages and upgrade
  sudo apt update && sudo apt upgrade
  # remove packages that were automatically installed as dependencies and are no longer needed
  sudo apt autoremove
  # Set hostname, replace example-hostname with one of your choice.
  hostnamectl set-hostname example-hostname
  #list time zone
  timedatectl list-timezones

# System Settings

Syntax	Action
timedatectl	list time zone
timedatectl set-timezone 'Australia/Brisbane'	set timezone