regex - Perl search and replace NOT working -


i trying replace string in file procedure seems removing string , not replacing want

example

perl -ne 'print unless s/serverip=${solid.host}/ads/;' needstobereplaced.prp > blah.txt

will remove

"serverip=${solid.host}" , leave line blank instead of printing "ads" in place

i running in windows way. have no 3rd parameter in regex because want change first occurrence. have tried 

perl -pi -e 's/serverport=${solid.port}/ads/;' needstobereplaced.txt

but permission errors editing in place no go

you print line if substitution not successful. if want print always, not use unless:

perl -pe "s/serverip=\${solid.host}/ads/;" needstobereplaced.prp > blah.txt

you should escape dollar sign prevent interpretation perl.

also note double quotes must used on ms windows.


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