Command for network state and details

On Windows: netstat -an
On Linux: netstat -tnlp

Little useful commands of linux

grep is for grep out some line from an input, for some specified keywords

lsof will give you a list of the running processes maps to their ports
which are using

kill is for killing a process, with paramater "-9 [PROCESS_NAME]"

ps will handle the process listing job, often be used with "aux" parameters