The Linux terminal serves as the interface between users and the kernel, interpreting shell commands that control system operations. Mastering these commands is essential for effective system management.

Keyboard Shortcuts

• Ctrl+Alt+T: Launch new terminal
• Ctrl+Shift+N: Open terminal in current directory

Privilege Escalation

The sudo comand allows regular users to execute administrative tasks:

user@host:~$ sudo apt update
[sudo] password for user: 

User Management

Switch between user accounts with su:

regular@host:~$ sudo su
root@host:~# exit
regular@host:~$

Command Structure

Linux commands follow this pattern:

command [options] [arguments]

Directory Navigation

Key directory commands:

ls      # List contents
cd /var # Change directory
pwd     # Show current path

File Operations

Essential file commands:

touch newfile.txt  # Create file
rm oldfile.txt     # Delete file
cp file1 file2     # Copy file
mv file1 /tmp      # Move file

System Information

date          # Show system time
df -h         # Display disk usage
ps aux        # List running processes
ifconfig      # Network configuration

File Compression

Archive and compress files:

tar -czvf archive.tar.gz /path/to/files
tar -xzvf archive.tar.gz

Permissions Management

Modify file permissions:

chmod 755 script.sh
chown user:group file.txt

Network Utilities

ping google.com
which curl
file document.pdf

System Maintenance

alias ll='ls -alF'  # Create shortcut
clear              # Reset terminal