[sudo-users] Sudo seems to run mail command and fails on read-only file system

[Todd C. Miller]

In message <4CFF7DBC.90000 at wilson-cooke.co.uk>
	so spake Geoffrey Viljoen (geoff):

> Does anyone know what sudo might be attempting to do with the mail 
> command when I correctly authenticate?

Sudo can be configured to send mail for all commands, check your
sudoers file for the mail_always setting.

 - todd