Having ConnectBot on your phone can be a life-saver when someone has a log file that is filling with error messages and growing so huge, it is nearly filling the disk. One quick ssh connection in to the server, df -h shows something amiss in the partition with users' folders, du -b /home | sort -n eventually finds the culprit. Then had to phone the user to warn them their computer was about to misbehave, back into ConnectBot and this time make a direct connection to their workstation, forcibly log them out, so the process that was writing the log file terminated, because the space occupied by a deleted file can't be recovered while some other process still has a handle on it, and then the server brothe a sigh of relief and everyone else's computers started working again. The user logged back in and finished her day's work, while I confirmed that no more error messages were being logged (turned out later to be an out-of-date version of AMOR not playing nicely with the latest XOrg),and everyone was happy.
Oh, and I didn't do all this from my laptop at home because I was standing outside a hospital, while my friend was inside being treated .....