Selecting an X display | LinuC Level 1 101 Exam original practice question

1.01.5Basic

Connect a new X client to display 0 and screen 0 on the local host.

Which environment assignment is conventional?

Hint 1: Focus on the requirement

Use the X client variable whose value identifies host, display number, and screen number.

Hint 2: Key terms

Review the short definitions before comparing the X Window System choices.

DISPLAY: The environment variable that tells an X client where to connect.
:0.0: A display notation for local display 0 and screen 0.
Display number: The X server instance number in a host:display.screen value.
Screen number: The screen component in an X display value after the dot.

Detailed explanation

IncorrectXSERVER=0.0

Incorrect. XSERVER is not the standard client display variable.

IncorrectSCREEN=localhost

Incorrect. SCREEN is not the standard DISPLAY variable.

Incorrectexport XAUTH=:0

Incorrect. XAUTH selects authorization data, not the display destination.

Correctexport DISPLAY=:0.0

Correct. export DISPLAY=:0.0 directs clients to the local display and screen.

An example you can run in a temporary verification environment.

DISPLAY=:0.0 sh -c 'printf "%s\n" "$DISPLAY"'

:0.0。X serverへ接続は行わない

Foundation review

DISPLAY selects a destination; it does not itself authenticate the client or start an X server.

Avoid overwriting DISPLAY when SSH forwarding has already configured a secure destination.

Question IDKL-101-372

Environmentshell変数展開のみ

Last technical review2026-08-13

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