Question 1

What does sudo do?

Accepted Answer

Run commands as another user (usually root) Executes a command as root or another user according to /etc/sudoers.

Question 2

Is sudo dangerous?

Accepted Answer

HIGH risk. Runs with elevated privileges; one typo can damage the whole system. Re-read the whole command before pressing Enter — especially paths and globs. Avoid `sudo -i`/`sudo su` for routine work; they hide actions from the audit trail. Never edit /etc/sudoers directly — use visudo. Redirections run as YOU, not root: `sudo echo x > /etc/f` fails; use `| sudo tee`.

Question 3

How can I use sudo more safely?

Accepted Answer

sudo -l — Check what you may run sudoedit <file> — Edit root files safely sudo -k — Drop cached credentials when finished

Flag	Meaning
`-u`	Run as another user
`-i`	Login shell as root
`-s`	Run a shell
`-l`	List allowed commands
`-k`	Forget cached credentials
`-E`	Preserve environment⚠ May leak your environment into a privileged context.