sudo

The sudo command in Linux is used to execute a command with the privileges of another user, typically the root user. It allows you to perform administrative tasks that require elevated permissions. When you use sudo, it prompts you for your password (if needed) and temporarily grants you access to perform the task as if you were the root user. This enhances system security by requiring explicit permission before performing sensitive operations.

Example Commands:

sudo apt upgrade

Upgrade all packages on a Debian based system.

sudo ls /etc

Access restricted files in /etc directory.

sudo nano /etc/hosts

Edit the hosts file with root privileges.

sudo chmod 755 /mydirectory

Change user permissions for a directory.

sudo systemctl restart apache2

Restart Apache web server service.

The sudo command is an essential tool in Linux for performing administrative tasks that require elevated privileges. It allows users to execute commands with the permissions of another user, typically root, thereby enabling system administration while maintaining security through controlled access.