In a bash shell, type the complete command that sets and exports the environment variable X clients read to find their display, so that they connect to screen 0 of display 0 on the local machine.
LPIC-1 Exam 102-500, objective 106. User interfaces and desktops medium
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Answer
Type the answer.
Accepted answers
export DISPLAY=:0.0export DISPLAY=:0export DISPLAY=':0.0'export DISPLAY=":0.0"export DISPLAY=':0'export DISPLAY=":0"
Case sensitive — Linux is, and grading LS as ls would teach a falsehood.
Why
DISPLAY tells an X client which X server to contact, in the form host:display.screen. An empty host means the local machine over a Unix domain socket, so :0.0 is display 0, screen 0, locally; :0 is the common shorthand because screen 0 is the default. A remote form looks like workstation.example.com:0.0, and `ssh -X` sets DISPLAY to a proxy value such as localhost:10.0 in the remote shell. The variable must be exported, not merely set, so that child processes inherit it.
Where this comes from
- Cited
- LPI exam objective 106.1
- What it says
- Awareness of the DISPLAY variable and how X clients locate an X server.
Practise this
Reading one question is not practice. The trainer will draw a set from objective 106 and space the ones you get wrong.