Linux Commands #23 - id — Read Your Linux Identity (UID, GID, Groups Explained)
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In this video, we dive deep into professional IT workflows to help you learn faster and code smarter. Whether you're a DevOps engineer, a SysAdmin, or a curious developer, our "No Filler" approach ensures you get the facts without the fluff.
The id command reveals your Linux IDENTITY: your username, your numeric UID, your primary group, and every additional group you belong to. Once you can read its output, you'll understand 80% of all Linux permission errors.
In this lesson:
🎯 What UID, GID, and groups mean
🎯 id — your full identity card
🎯 id -u, -g, -nG — pinpoint exactly what you need
🎯 id USERNAME — check OTHER users (sysadmin gold!)
🎯 The "groups need re-login" gotcha
The full course is at dargslan.com — taught by an MCT-certified instructor with 20 years of IT experience.
⏱ TIMESTAMPS
0:00 "Why can't I edit this config?"
1:15 The three pieces of identity
1:45 First try: id
2:00 Useful flags: -u, -g, -nG
2:30 Investigate others: id USERNAME
3:30 Real example: debugging Docker permissions
4:00 Common mistake: groups need new login
📚 Linux Commands — The First 50 · Lesson 23 · dargslan.com
#id #linuxid #linuxgroups #linuxpermissions #linuxtutorial #commandline
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