Users and Group Management Flashcards
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Read the first 7 Users and Group Management flashcards as text
Which file stores the encrypted passwords for user accounts on a modern Linux system?
Answer: /etc/shadow
Modern Linux systems store encrypted passwords in /etc/shadow, which is readable only by root.
What command would you use to lock a user account so they cannot log in?
Answer: usermod -L
usermod -L locks a user account by prepending a '!' to the password hash in /etc/shadow.
Which field in /etc/passwd specifies the user's default shell?
Answer: Field 7
The seventh (last) field in /etc/passwd specifies the user's login shell, e.g., /bin/bash.
What does the command 'id username' display?
Answer: The user's UID, GID, and group memberships
The id command displays a user's numeric UID, primary GID, and all supplementary group memberships.
Which command removes a user and their home directory from the system?
Answer: userdel -r username
userdel -r deletes the user account and recursively removes their home directory and mail spool.
A new user is created with useradd. Where is their home directory placed by default?
Answer: /home/username
By default, useradd creates the home directory at /home/username unless overridden with the -d option.
Which command interactively changes a user's password?
Answer: passwd
The passwd command prompts for a new password and updates /etc/shadow with the new hash.