Quick reference on how to factory reset this sip phone (useful when you don’t know admin password on phone).

Setup Zimbra Collaboration Suite on a cloud server without public interface (read: behind NAT) may waste you an afternoon trying to figure out why local emails (same domain) are not delivered, while sending/receiving mail from/to the internet works flawless.

Sometime you need to reset MySQL password on a server you have root access to. Here’s a step-by-step how-to to accomplish this task on a CentOS 6 server.