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Full Discussion: extracting substrings from variables
Top Forums Shell Programming and Scripting extracting substrings from variables Post 302525579 by ctsgnb on Friday 27th of May 2011 06:04:31 AM
Old 05-27-2011
double pipe means "OR"
cond1 || cond2
cond2 will be evaluated only if cond1 fails.

Code:
$ a=1
[ctsgnb@shell ~]$ [[ $a -eq 0 ]] && echo "OK" || echo "KO"
KO
[ctsgnb@shell ~]$ a=0
[ctsgnb@shell ~]$ [[ $a -eq 0 ]] && echo "OK" || echo "KO"
OK

 

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NAME

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OVERVIEW

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SETUP

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COPYRIGHT

       Copyright (c) 2011 by Tobias Oetiker. All right reserved.

LICENSE

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       the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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AUTHOR

       Tobias Oetiker <tobi@oetiker.ch>

2.6.8								    2013-03-17							  SMOKEPING_CGI(1)
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