Linux bash: How to replace in file only if line meets additional condition?

Hello,

i have a directory with many files, each file contains various HTML and also several occurences of ".com/" and i want to replace .com/ by .com/# BUT replacement should happen only if the line where is .com located do NOT contains phrasse: -t

Please how to do it via Linux command line?

Thank you

 

You can likely do this with a mix of sed and regex (http://www.regular-expressions.info/lookaround.html).

 

One can try following (with caution and having backup):

perl -i -pe 's/\.com\//$&#/ unless /-t/' *txt

sed -e '/-t/! s:\.com/:.com/#:g' -i *.txt g means global, replace multiple occurences at one line
sed -e '/-t/! s/\.com\//\.com\/#/' -i *.txt