Monthly Archives: July 2010

Connecting to a Crashplan instance in the Cloud

Crashplan is a great “free” utility to automate the backing up of all your systems. I have been using it for almost a year to backup all my computers including my cloud instances.

I had to perform some maintenance on one of my cloud computers and forgot how to connect the admin tool to it. Below I’m outlining the steps so I won’t forget again.

* Create a ssh tunnel to the machine

ssh -L 4200:localhost:4243 host

* Updated local CrashPlanDesktop to use port 4200

vi /usr/local/crashplan/conf/ (change port to 4200)

* Run CrashPlanDesktop


* Don’t forget to revert the changes to the configuration file

vi /usr/local/crashplan/conf/ (change port back to 4243)


Empty Postfix Mail Queue

Had an issue today where a bug sent over 20,000 messages into my postfix mail queue. Google then started “rate” limiting me as this issue was basically a DOS attack on my mail box. After some research, I found a couple ways to empty the postfix mail queue.

If you only want to purge the queue of email from use user, as root try:

mailq | tail +2 | grep -v ‘^ *(‘ | awk ‘BEGIN { RS = “” } { if ($8 == “” && $9 == “”) print $1 } ‘ | tr -d ‘*!’ | postsuper -d –
To purge the entire queue:

postsuper -d ALL