Configuring an APC Back-UPS ES 550 with ClearOS 5.2:

1. Connect included RJ-45 to USB cable.
2. Install net-snmp:

   yum install net-snmp

3. Download the latest APCUPSD rpms from SourceForge. apcupsd is the base package, apcupsd-multimon is the web interface. For ClearOS 5.2, use the .el5.i386.rpm packages.
4. Install:

   rpm -ivh apcupsd-3.14.8-1.el5.i386.rpm
   rpm -ivh apcupsd-multimon-3.14.8-1.el5.i386.rpm

5. Start monitoring service:

   service apcupsd start

6. Display UPS status:

   apcaccess status

7. Browse to http://hostname/cgi-bin/multimon.cgi