Filter match in line sed

For using match in sed replacement, just border it with '\(' and '\)':
echo Before123 | sed 's/Before\([0-9]*\)/\1After/g'
123After	# number is matched withtin '\( \)' and replaced in '\1'
Example with 2 match replacements
echo a_b | sed 's/\(^.*\)_\(.*$\)/first is \1 and \2 is after/g'

Similar codes

0 vote292 views1 answer
How to update old branch
Shell/Bash
0 vote268 views1 answer
Batch file path
Shell/Bash
0 vote251 views1 answer
Oh zsh
Shell/Bash
1 vote265 views1 answer
Restart network centos
Shell/Bash
3 votes270 views1 answer
Clean local branches git
Shell/Bash
0 vote277 views1 answer
Batch delete all folders and files
Shell/Bash
0 vote289 views1 answer
Date fns install
Shell/Bash
1 vote296 views2 answers
Postgres create admin user with password
Shell/Bash
1 vote280 views1 answer
Failed to start cron.service: Unit not found. in centos7
Shell/Bash
0 vote263 views1 answer
WSL Updating the Ubuntu OS
Shell/Bash