Reattaching to a screen session | LinuC Level 1 101 Exam original practice question

1.01.4Basic

A named GNU screen session maint was detached.

Reconnect to it from another login shell.

Which command is appropriate?

Hint 1: Focus on the requirement

The named screen session already exists and is detached, so select the reattach operation.

Hint 2: Key terms

Review the short definitions before comparing the process and job-control choices.

screen: A terminal multiplexer that keeps shell sessions and processes on a server.
Detach: Disconnecting a terminal client while leaving the multiplexer session running.
Reattach: Connecting a new terminal client to an existing multiplexer session.
Session name: The human-readable identifier used to select a screen session.

Detailed explanation

Incorrectscreen -S maint

Incorrect. screen -S typically creates or selects a session rather than reattaching to a detached one.

Correctscreen -r maint

Correct. screen -r maint reattaches the detached session.

Incorrectscreen -d /bin/sh

Incorrect. This starts a session with a command rather than reattaching to maint.

Incorrectscreen --fg maint

Incorrect. --fg is not the standard screen reattach option.

An example you can run in a temporary verification environment.

screen --help 2>&1 | head || true

screenがある場合はhelp。sessionは作らない

Environment: GNU screen helpのみ
Use a disposable process or test shell when checking lifecycle commands.
Exact output and option names can vary slightly by distribution and tool version.

Foundation review

Creating a screen session and reattaching to a detached one are different lifecycle operations.

List existing sessions before attaching so the selected name and state are unambiguous.

Question IDKL-101-358

EnvironmentGNU screen helpのみ

Last technical review2026-08-13

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