hi!
iam administering 92 pc remotely thru ssh and i want to know is there a command to know who is still up and running in my network coz some our employee leave there computer still up and running (intentionally or forgot to shutdown) iam using a dhcp server to give random ip address in each pc that why i cant use ip address to ping each pc ip address coz it change. i wonder can i use hardware address to know who is sill up and running coz hardware address is not changing but how? iam using slackware 10.2 i try arping but i can not install it?

You could use nmap to ping scan the subnet. Something like:

nmap -sP 10.1.1.1-254

Putting in your own IP range. That will tell you how many client machines are still online, and can also give you the MAC for each result.

thanks! MS3FGX