lab-wakeup: wake up suspended desktops

Introduction

Usage: lab-wakeup $HOST

Use lab-wakeup $hostname when you need to wake up a desktop that has suspended. For example, if you try to SSH into volcano.ocf.berkeley.edu and get an error similar to

ssh: connect to host $host port 22: No route to host

you can try lab-wakeup volcano on supernova or your staff VM to wake it, after which you should be able to log in without issue. You may need to install wakeonlan if it's not there already.

See also: [ocf-suspend](https://github.com/ocf/puppet/blob/master/modules/ocf_desktop/file s/suspend/ocf-suspend), which suspends the desktops on 15-minute intervals.