Question 1

What does visudo do?

Accepted Answer

Safely edit sudoers Locks and syntax-checks /etc/sudoers before saving.

Question 2

Is visudo dangerous?

Accepted Answer

HIGH risk. Mistakes can remove everyone’s sudo access. Always keep a second root session open while editing. NOPASSWD: ALL entries grant unrestricted root without a password — limit to specific commands. A syntax error can disable sudo entirely if edited with a normal editor.

Question 3

How can I use visudo more safely?

Accepted Answer

visudo -c — Validate after editing visudo -f /etc/sudoers.d/<name> — Use drop-in files

Flag	Meaning
`-c`	Check syntax only
`-f`	Edit a specific file (e.g. /etc/sudoers.d/x)