Remove line of text from multiple files in Linux

Question

Is there a simple way to remove the same line of text from a folder full of text documents at the command line?

Answer 1

Consider grep -v:

for thefile in *.txt ; do
   grep -v "text to remove" $thefile > $thefile.$$.tmp
   mv $thefile.$$.tmp $thefile
done

Grep -v shows all lines except those that match, they go into a temp file, and then the tmpfile is moved back to the old file name.