Linux Commands #25 - passwd — Change Linux Passwords Securely (Self + Sysadmin Modes)
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passwd is your password lifecycle manager. Change yours daily, reset others' as admin, force users to change at next login. All with invisible typing, hashed storage, and full audit logging. The security command every Linux user must master.
⚠️ This is the FIRST Stage 05 command that actually MODIFIES your system — be ready!
In this lesson:
🎯 passwd — change your own (current pw + new × 2)
🎯 sudo passwd USER — admin changes someone else's
🎯 sudo passwd -e USER — force change at next login
🎯 Password strength requirements (PAM rules)
🎯 The deadly mistake: passwd USER WITHOUT sudo (changes YOUR pw!)
Full course at dargslan.com — secure habits, real workflows, taught for beginners.
⏱ TIMESTAMPS
0:00 The security audit story
1:00 The three security guarantees
1:30 First try: the prompts walkthrough
2:00 Strength rules (PAM enforcement)
2:30 Three modes: self / admin / force-expire
3:00 Real example: onboarding a new dev securely
4:00 Common mistake: passwd USER without sudo
📚 Linux Commands — The First 50 · Lesson 25 · Stage 05 finale · dargslan.com
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