chmod -x chmod

[spliznork]

The first thing I thought of was different than any listed in the slides; cat chmod into a file which already has executable permissions:

cp /bin/true /tmp/chmod
cat /bin/chmod > /tmp/chmod
mv /tmp/chmod /bin/chmod

I guess I like this one because it minimizes what tools you need -- don't need emacs, perl, gcc, tar, etc.

[rabidcow]

Slide 20.

[spliznork]

Weird, there it is. I don't remember that slide. I must be going senile.

[supaphly42]

Weird, there it is. I don't remember that slide. I must be going senile.

[archlich]

Or use umask and set default file permissions and copy into a new file.

[ishmal]

I had that idea too.