I previously wrote about command line scripting with ed and ex. I just had an opportunity to put ex into use in practice.
I needed to edit hundreds of files, searching for a line of text and then deleting it along with the next 22 lines.
I created an
exscript file containing this code:
g/block_2/ .,+22 d x
Update: you can probably simplify that deletion command to this:
Then ran it on a file to test it:
$ ex - index.html < exscript
Once I confirmed that it worked correctly, I ran it on the entire directory:
for f in *.html do ex - $f < exscript done
This solution worked perfectly for my task, which was to remove a block of text from every page of a website downloaded with wget.