element6/gist:6d419dcc4f1413f96c7aca1bb6788122

Created June 5, 2017 01:27

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use env var in command line

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gistfile1.txt

	FOO=${VARIABLE:-default}
	Or, which will assign to VARIABLE as well:
	FOO=${VARIABLE:=default}

	LOC=; eval "echo ${LOC:=en}; echo $LOC"

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