Maintenance

The ISE was getting the error
java.lang.NoClassDefFoundError: Could not initialize class sun.awt.X11GraphicsEnvironment
when running xwiki.
It turns out that the existence of quotes in JAVA_OPTS directives causes the option to be ignored. So, for future reference, use -Djava.awt.headless=true instead of -Djava.awt.headless="true" when launching tomcat on a headless server.

After an update to DSM 4.2 rutabaga no longer allowed rsync backups, failing with:

sh: rsync: not found
rsync: connection unexpectedly closed (0 bytes received so far) [Receiver]
rsync error: remote command not found (code 127) at io.c(605) [Receiver=3.0.9]

After much wailing and gnashing of teeth we discovered that non-interactive users do not have /usr/syno/bin in their path (it *is* in their path if they shell in to the NAS, so they can run rsync *from* the NAS when shell'd in).

So, that's an easy fix, says us: add a symlink to /usr/syno/bin/rsync in a logical spot that *is* in a non-interactive path, like /usr/bin.

Problem: admin user cannot su root (error message = su: must be suid to work properly), so cannot create symlink.

Answer: TURN ON TELNET AND LOG IN AS ROOT USING THE WORST POSSIBLE METHOD!!! Then, you make the symlink and turn off telnet - quick!

This morning we got nets to set up B047 on the switch. Some time after that 3 machines lost the ability to get a DHCP address - I have no idea if there is a causal relationship between these things.

After much mucking about, it *looks* like it might have been a communication problem between the DHCP server and the machines.
Even forcibly releasing the DHCP lease didn't make any difference.

In the end, I booted the machine with a LiveCD and fiddled with enabling/disabling the network (in the network manger). I got a proper IP and rebooted in the installed OS. That seemed to break it out of the loop.

A bit perplexing and aggravating because I don't actually know what the problem was...