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

31 votes325 views6 answers
Replace using sed
Shell/Bash
1 vote336 views1 answer
For loop change increment matlab
Shell/Bash
12 votes346 views5 answers
Restart postgres ubuntu
Shell/Bash
0 vote329 views1 answer
Centos epel-release
Shell/Bash
2 votes342 views2 answers
Error: Not a valid ref: refs/remotes/origin/master fatal: ambiguous argument 'refs/remotes/origin/master': unknown revision or path not in the working tree.
Shell/Bash
121 votes337 views6 answers
Undo git commit
Shell/Bash
1 vote335 views1 answer
Extract tar to destination
Shell/Bash
0 vote290 views1 answer
Shell script multithreaing
Shell/Bash
0 vote335 views1 answer
Where is pip installed packages stored in colab
Shell/Bash
35 votes342 views6 answers
Markdown image
Shell/Bash