Can't do: sudo cd /var/cron/tabs

[Todd C. Miller]

>  1.  Why can't I cd to the tabs directory?
>  2.  Why will sudo not work with cd?

>From sudo's TROUBLESHOOTING file:

Q) When I try to use "cd" with sudo it says "cd: command not found".
A) "cd" is a shell built-in command, you can't run it as a command
   since a child process (sudo) cannot affect the current working
   directory of the parent (your shell).

 - todd