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Old 09-01-2008, 01:28 PM   #1
john test
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What is the difference between DISPLAY= and export DISPLAY=??

What is the difference between DISPLAY-:0.0 and DISPLAY=:10.0 ??

What is the difference between export DISPLAY=:0.0 and export DISPLAY=:0.0 and export DISPLAY=:10.0???

When would it be appropriate to use export DISPLAY=localhost:0.0??
 
Old 09-01-2008, 01:42 PM   #2
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Quote:
Originally Posted by john test View Post
What is the difference between DISPLAY= and export DISPLAY=??
One sets a variable, the other exports it.
man bash
/^ENVIRONMENT


Quote:
Originally Posted by john test View Post
What is the difference between DISPLAY-:0.0 and DISPLAY=:10.0 ??
The first one is syntactically wrong.

Quote:
Originally Posted by john test View Post
What is the difference between export DISPLAY=:0.0 and export DISPLAY=:0.0 and export DISPLAY=:10.0???
man X
/DISPLAY NAMES

Quote:
Originally Posted by john test View Post
When would it be appropriate to use export DISPLAY=localhost:0.0??
Where ever typing more than necessary is an option ;}



Cheers,
Tink
 
Old 09-01-2008, 02:29 PM   #3
john test
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Ok got it man bash-builtins shows the export command and the difference is that export seems to make the variable global

I can get the syntax error of - vs =, but the question was sort of 0.0 vs 10.0 and which one is appropriate in which situation?

man x fails
man X fails
man X/display-names fails

Is Man X distro dependant? I'm starting up on ubuntu 7.10
 
Old 09-01-2008, 05:49 PM   #4
matthewg42
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When you export a variable in a borne style shell, it becomes part of the environment, and is visible to child processes of that shell.

If you simply set a variable without exporting it, that variable is only visiable inside the shell, and not by child processes.
 
Old 09-01-2008, 06:41 PM   #5
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Quote:
Originally Posted by john test View Post
Ok got it man bash-builtins shows the export command and the difference is that export seems to make the variable global
Almost ... they're still specific to the one shell, but with
the export they're passed on to child processes

Quote:
Originally Posted by john test View Post
I can get the syntax error of - vs =, but the question was sort of 0.0 vs 10.0 and which one is appropriate in which situation?

man x fails
man X fails
man X/display-names fails

Is Man X distro dependant? I'm starting up on ubuntu 7.10
Hmmm ... works on Slackware "man 7 X"

Shows up in the "SEE ALSO" section of "man Xorg"?



Cheers,
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