Gnuwin Grep only value [duplicate]

Question

This question already has answers here:

How to use grep to get anything just after `name=`? (5 answers)

Closed 8 years ago.

Example I have ver.txt

#tac
version=xxx

I want to display only xxx.

I can try grep, sed, gawk.Just want to learn how to make it.

Answer 1

the awk answer:

awk -F = '$1=="version" {print $2}' file

Sed

sed -n '/^version=/s///p' file

If you are running these commands from a windows command prompt, then single quote is not a valid grouping character, you may have to do this

awk -F = "$1==\"version\" {print $2}" file

Answer 2

One of many ways is to use grep interpreting the pattern as a perl regular expression, and use a positive look-behind:

grep -oP '(?<=version=).*' infile