I bought a TonidoPlug, which is a wall-wart with an embedded Linux server (running Ubuntu 9.04 Jaunty).  Out of the box, sudo gave the error:

sudo: must be setuid root

This message means exactly what it says -- the sudo command is not setuid and it must be setuid (and owned by root).

chown root:root /usr/bin/sudo
chmod u+s /usr/bin/sudo

will correct the 'problem.' (I put quotes around 'problem' because there are some who will say that this is a security feature.)

There are hundreds of reports on the net about "sudo: gem: command not found".  Out of the dozen or so I looked at, the suggested resolution amounted to "ensure that 'gem' is in your PATH."

Yep.  It is in my path.  That is to say, the following works:
­

gem --help

but the following fails:

sudo gem --help

Further confusing matters, gem is in the path shown by:

Here is a side-by-side of Bort and Suspenders.  Both are Rails starter applications.

September 10, 2009

If you get

Anonymous modules have no name to be referenced by

when you're using a Rails template, it can be caused by referencing an undefined variable.  You can pretend that message means that the [nothing.] in [nothing.]VARIABLE_NAME is an anonymous module.