Network Related Commands, Tools and Files

Configuration commands and tools:
Note: See Man pages for use; you may need to use the locate command to find some of these.

• netconfig (set up initial networking)
  
• hostname (your fully qualified host name)
  
• ipchains (firewall and masqarading)
  
• iptables (firewall and masqarading)
  
• mount (check what remote file systems are mounted)
  
• chkconfig (this controls which scripts run at bootup)
• netconfig -set up networking
• netconf -configure networking
• netstat -lots of info re routing, etc.
• tcpdump -dumps all tcp traffic to screen
• ifconfig -displays or manipulates the network interfaces
• ifup -use to activate a singe interface, as opposed to using /etc/ini.d/network start
• ifdown -use to stop a singe active interface, as opposed to using /etc/ini.d/network stop
• nslookup -get information from name servers (replaced by host or dig)
• host -DNS lookup utility
• dig -send domain name query packets to name servers
• pump -configure net interface using DHCP protocol
• whois -retrieves info on domains by name, also see whois.arin.net for lookup via IP

Network Related Files (some of many)

To view or edit network card configuration files look in /etc/sysconfig/network-scripts/
If you have loaded your network cards as modules you can view or edit the driver, IRQ and I/O in /etc/conf.modules

Other network related files:
/etc/hosts
/etc/hosts.allow and hosts.deny
/etc/exports
/etc/named.conf and the directory it references if running DNS server
/etc/inetd.conf
/etc/nsswitch.conf
/etc/resolv.conf
/etc/sysconfig/network
/etc/sysconfig/network-scripts/ and inclosed files