Tips from gnulamp.com
VSIZE (Virtual memory SIZE) – The amount of memory the process is currently using.
This includes the amount in RAM and the amount in swap.
RSS (Resident Set Size) – The portion of a process that exists in physical memory (RAM).
The rest of the program exists in swap. If the computer has not used swap, this number will be equal to VSIZE.
What Network Services are Running?
$ netstat -atup
$ netstat -ap|grep LISTEN|less
This can be helpful to determine the services running.
Need stats on dropped UDP packets?
$ netstat -s -u
TCP
$ netstat -s -t
summary of everything
$ netstat -s
looking for error rates on the interface?
$ netstat -i
Listening interfaces?
$ netstat -l
