LCA User & Permission Management 4

Question 1

Which chage command sets the account expiration date for user 'bob' to December 31, 2026?

Accepted Answer

chage -E 2026-12-31 bob

Answer

chage -E sets the account expiration date in YYYY-MM-DD format.

Question 2

What is the purpose of the /etc/skel directory?

Accepted Answer

Stores skeleton (template) files copied into new users' home directories

Answer

/etc/skel contains template files like .bashrc and .profile that are copied to a new user's home directory upon account creation.

Question 3

A file is owned by root with permissions -rwxr-xr-x. A regular user runs the file. Under which UID does the process execute?

Accepted Answer

The user's own UID

Answer

Without the SUID bit, processes always run as the UID of the user who launched them, regardless of file ownership.

Question 4

Which command removes user 'carol' and deletes her home directory and mail spool?

Accepted Answer

userdel -r carol

Answer

userdel -r removes the user account along with the home directory and mail spool.

Question 5

What does the SGID bit do when set on a directory?

Accepted Answer

New files created inside inherit the directory's group

Answer

The SGID bit on a directory causes newly created files and subdirectories to inherit the directory's group ownership.

(LCA) Certified Linux Administrator Practice Test