Temporarily blocking system logins | LinuC Level 1 102 Exam original practice question

1.10.2Basic

During maintenance, reject interactive logins for non-root users.

Show users the reason for the rejection.

Which file is commonly used?

Hint 1: Focus on the requirement

Identify what must change and what must remain unchanged. Then choose the command whose scope matches that requirement.

Hint 2: Check each command's role

Separate commands that display information, change state, remove data, or affect a child process.

~/.nologin: Incorrect. A file under one user's home does not represent a system-wide block.
/etc/hosts: Incorrect. /etc/hosts is a static name map.
/etc/nologin: Correct. /etc/nologin is the conventional maintenance lockout file.
/var/log/nologin: Incorrect. /var/log is for logs, not the standard login-control file.

Detailed explanation

Incorrect~/.nologin

Incorrect. A file under one user's home does not represent a system-wide block.

Incorrect/etc/hosts

Incorrect. /etc/hosts is a static name map.

Correct/etc/nologin

Correct. /etc/nologin is the conventional maintenance lockout file.

Incorrect/var/log/nologin

Incorrect. /var/log is for logs, not the standard login-control file.

An example you can run in a temporary verification environment.

printf '%s
' 'maintenance in progress' > /tmp/pathpass-nologin; cat /tmp/pathpass-nologin; rm -f /tmp/pathpass-nologin

maintenance in progress

Foundation review

Check whether the command acts on the current shell, a new process, an existing process, or a file.

Use the supplied command and compare the output with the expected result.

Question IDKL-102-1135

EnvironmentGNU coreutils / /tmpの一時ファイル

Last technical review2026-08-20