arp | Address resolution protocol Type "arp -a" to display entries in the arp cache. | |
ifconfig | A command line tool used to configure a network interface. There is a man page available for this program. | |
ifdown | Shuts down a network interface | |
ifup | Starts a network interface such as eth0 or ppp0 | |
ipchains | A tool used to administer firewall rules. | |
netconf | The Redhat GUI network configuration tool. | |
netconfig | Another network configuration tool which is usually run when the system is installed. Netconf is better. | |
netstat | Type "netstat -rn" to see the routing table. Type "netstat-in" to see the interface info. | |
nslookup | Used to test DNS configuration by querying DNS servers. | |
ping | A network tool used to sent ICMP test packets to other hosts to determine if they can respond or are reachable. | |
ripquery | A tool to query some routers for their routing table. | |
route | Typing "route -n" will show the routing table | |
traceroute | Sends data to a remote host to a port that doesn't exist with a TTL field at 1,2,etc to get the intermediate hosts to send back their addresses reporting errors. The destination will report an unreachable port error sending its address. |