nmap fullform networkmapper which help us for scan the ipaddress.
nmap -sT ipaddress
netstat --route
netstat --statistics --route
netstat --tcp --listening --programs
netstat --tcp --numeric
netstat -i
netstat -i | grep 80
netstat -tulpn
netstat -an | grep LISTEN
How to calculate the memory??
free memory = free + cache/buffered memory
used memory
total memory
(by using the top command).
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