Running Software Checks
If there is trouble on the network, some actions that you can take to diagnose and fix software-related problems include:
Using the netstat command to display network information.
Checking the hosts database to make sure that the entries are correct and up to date.
If you are running RARP, checking the Ethernet addresses in the ethers database to make sure that the entries are correct and up to date.
Trying to connect by telnet to the local host.
Ensuring that the network daemon inetd is running. To do this, log in as superuser and type:
# ps -ef | grep inetd
Here is an example of output displayed if the inetd daemon is running:
root 57 1 0 Apr 04 ? 3:19 /usr/sbin/inetd -s
root 4218 4198 0 17:57:23 pts/3 0:00 grep inetd