:: Apache processes

:: Disk usage (in %)

:: Inode usage (in %)

:: IOstat

:: Connections through firewall

:: conntrack

:: Firewall Throughput

:: eth0 errors

:: eth0 traffic

:: Netstat

:: TCP port 443 connection count

:: TCP port 80 connection count

:: TCP port 873 connection count

:: Postfix Mailqueue

:: Postfix bytes throughput

:: Fork rate

:: Number of Processes

:: VMstat

:: CPU usage

:: Available entropy

:: Interrupts & context switches

:: Individual interrupts

:: Load average

:: Memory usage

:: File table usage

:: Inode table usage

:: Swap in/out