Practice Test Geeks(LCA) Certified Linux Administrator Practice Test
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User & Permission Management Flashcards

7 cards from real LCA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 User & Permission Management flashcards as text

  1. Which file stores the encrypted password hashes for local user accounts on a Linux system?

    Answer: /etc/shadow

    /etc/shadow stores hashed passwords and password aging info, readable only by root.

  2. What command changes the group ownership of a file named report.txt to the group 'finance'?

    Answer: chown :finance report.txt

    chown :groupname file changes only the group owner of a file.

  3. A file has permissions -rwsr-xr-x. What does the 's' in the owner execute position indicate?

    Answer: SUID bit is set

    An 's' replacing the owner execute bit means the SUID bit is set, causing the file to run as its owner.

  4. Which command locks a user account by prepending '!' to the password hash in /etc/shadow?

    Answer: usermod -L username

    usermod -L locks an account by inserting '!' before the password hash, preventing password-based login.

  5. What octal permission value sets read+write for owner, read-only for group, and no permissions for others?

    Answer: 640

    640 = owner rw- (6), group r-- (4), others --- (0).

  6. Which /etc/shadow field controls the maximum number of days a password is valid before it must be changed?

    Answer: Field 5 (maximum days)

    Field 5 in /etc/shadow specifies the maximum password age in days.

  7. A directory has the sticky bit set (drwxrwxrwt). What restriction does this impose?

    Answer: Users can only delete files they own

    The sticky bit on a directory prevents users from deleting or renaming files owned by others, even with write access.