Information aggregated from:

http://www.cyberciti.biz/tips/top-linux-monitoring-tools.html

Process information

• top
• htop
• atop
• ps
• pmap
• ps_mem.py ( My mirror )

System level information

• vmstat
• dstat
• uptime
• iostat
• sar
• mpstat
• atop

Memory information

• free
• pmap

User monitoring

• w

Network information

• netstat
• ss
• iptraf
• tcpdump
• nmap
• iftop

Web-based monitoring

• Nagios
• Cacti
• Munin ( http://munin-monitoring.org/ )