Linux Boolean Not operator?

SirTristan · 12-04-2007, 01:36 PM

What's the Boolean Not operator for Linux? For instance for use with 'ls', like the opposite of 'ls *.html' - I tried 'ls !*.html' but that doesn't work.

forrestt · 12-04-2007, 02:23 PM

It doesn't work that way. However, you can run:

Code:

ls | grep -v \.html\$

and get the answer you are looking for.

This will send the ls output to the grep command. The parameters for grep tell grep to return all lines that do not (the -v) end (the $) with ".html". the "." and the "$" must be escaped so the shell doesn't try to expand them before they are send to the grep command.

HTH

Forrest

chrism01 · 12-04-2007, 05:11 PM

I'd just go with
ls |grep -v '.html'
unless you've got some funky filenames, but forestt's soln is stricter if you have.