Rachel's Blog » bash http://www.willmer.com/kb Wed, 01 Feb 2012 14:27:33 +0000 en hourly 1 http://wordpress.org/?v=3.1.3 Bash: test for undefined variable http://www.willmer.com/kb/2007/08/bash-test-for-undefined-variable/ http://www.willmer.com/kb/2007/08/bash-test-for-undefined-variable/#comments Wed, 01 Aug 2007 09:56:46 +0000 Rachel http://www.willmer.com/kb/2007/08/bash-test-for-undefined-variable/ echo -n “myvar=${myvar:-notset}”

If myvar is null or unset then it will be set to “notset”.


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