Question

I have a linux config file with with format like this:

VARIABLE=5753
VARIABLE2=""
....

How would I get f.e. value of VARIABLE2 using standard linux tools or regular expressions?
(I need to parse directory path from file). Thanks in advance.

Answer 1

$> cat ./text 
VARIABLE=5753
VARIABLE2=""

With perl regular expression grep could match these value using lookbehind operator.

$> grep --only-matching --perl-regex "(?<=VARIABLE2\=).*" ./text
""

And for VARIABLE:

$> grep --only-matching --perl-regex "(?<=VARIABLE\=).*" ./text
5753