CPU

$ less /proc/cpuinfo
$ less /proc/loadavg
$ uptime

Memory

$ less /proc/meminfo
$ free

Hard Disk

$ dh -h
$ du

Integration

$ top
$ ps -ef
$ vmstat
$ netstat
$ sysstat

Hardware

$ sensors

Tools

• MRTG
• RRDTool
• ganglia

GPFS suggest Monitor tools

• dstat
• ifstat
• mmpmon
• nfsstat