Issue
I would like
pm.max_children = 5
to become;
pm.max_children = 8
and have been working on it and got no soludtions. Backreferences like \1 or \2 don't seem to be working with calculation.
sed -i -E "s/(pm.max_children)[^=]*=\s*(.+)/\1 = $(echo \2+3)/" /usr/local/etc/php-fpm.d/www.conf
Using perl commands are OK as well as long as it is solved.
Thank you.
Solution
perl -i.bak -wpe's/pm.max_children\s*=\s*\K([0-9]+)/$1 + 3/e' file
This keeps a backup due to .bak
; remove that (after testing) if you don't need a backup.
The \K
positive lookbehind drops all previous matches so that they are no longer included in the overall match $&
, and thus whatever has been matched before it is kept in the string and doesn't have to be restored in the replacement part.
Answered By - zdim Answer Checked By - Cary Denson (WPSolving Admin)