Linux allows users to: Used to switch from one user to another. Requires target user's password. Difference Between su and su - Switch to Application User Runs a command with elevated privileges. Why sudo is Preferred Run Root Shell with sudo Run Command as Another User Add User to sudo Group sudo usermod -aG sudo devuser sudo usermod -aG wheel devuser Real-World DevOps Usage sudo systemctl restart nginx sudo apt install docker.io Kubernetes Admin Commands sudo kubectl get nodes Principle of Least Privilege sudo useradd -m devops sudo usermod -aG sudo,docker devops Improper sudo access can allow: Templates let you quickly answer FAQs or store snippets for re-use. as well , this person and/or - Switch to another user- Run commands as another user- Get administrative access securely - User environment- PATH variables- Home directory - Better security- Logging and auditing- Limited root access- Safer administration - Only required permissions- Not full root access - Privilege escalation- Full server compromise- Accidental system damage - Prefer sudo over direct root login- Avoid sharing root password- Audit sudo access regularly- Use visudo for editing sudoers- Grant minimum required permissions