How can I restore the executable bit of /bin/chmod?

I have removed the executable permission from /bin/chmod

How can I recover from this scenario?

2 Answers

There are several methods. The easiest will probably be:

install -m a+x /bin/chmod . ./chmod 

You can use perl. see man 2 chmod.

perl -e 'chmod 0755, "/bin/chmod"' 

The simplest solution may be to boot using a live CD, mount the file system and change the permissions from there.