Monitoring multiple servers with Munin
Munin is a network/system monitoring application that presents output in graphs through a web interface. Its emphasis is on simple plug and play capabilities. A large number of monitoring plugins are available. Using Munin you can easily monitor the performance of your computers, networks, SANs, and quite possibly applications as well. It makes it easy to determine "what's different today" when a performance problem crops up. It makes it easy to see how you're doing capacity wise on all limited resources.
Master monitoring server
1. Install Munin and Munin node daemon:
apt-get install munin munin-node
Installing Courier POP3 and IMAP services with MySql backend
This tutorial assumes you already have Postfix installed with MySql backend as described in this tutorial: Installing Postfix with MySql backend and TLS
1. Install required packages
apt-get install courier-authdaemon courier-authlib-mysql courier-pop courier-pop-ssl courier-imap courier-imap-ssl
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