Grep capture group

# matches and returns b
$ echo "abc" | grep -oP "a\K(b)(?=c)" 
b 
# no match
$ echo "abc" | grep -oP "z\K(b)(?=c)"
# no match
$ echo "abc" | grep -oP "a\K(b)(?=d)"

Source: stackoverflow.com

Similar codes

9 votes192 views5 answers
We no longer support global installation of Create React App.
Shell/Bash
0 vote218 views3 answers
Install
Shell/Bash
1 vote229 views1 answer
Install github linux
Shell/Bash
1 vote194 views1 answer
Ssh use other key file
Shell/Bash
185 votes530 views6 answers
Creating new branch in git
Shell/Bash
0 vote197 views1 answer
Sudo apt-get dbeaver
Shell/Bash
1 vote184 views1 answer
Change wp permission ubuntu
Shell/Bash
0 vote201 views1 answer
Create multiple copies in linux of file
Shell/Bash
0 vote185 views1 answer
Start mariadb on linux terminal
Shell/Bash
12 votes193 views2 answers
Install npm mac
Shell/Bash