This is very good tutorials for bandwidth monitoring,network monitoring and servers monitoring tools with clear step by step installation guides this includes Nagios, MRTG, RTG, Netmrg, Darkstat, monit, munin, mon, oreon, Saidar, Cacti, Bigsister, ibmonitor, zabbix. This resource is very useful for Users and Administrators to monitor their networks, bandwidth, and servers.