Mac OS Commands that make your life easier

Access clipboard(pasteboard)

pbcopy & pbpaste
echo 'hello world!' | pbcopy #copy to the pasteboard
echo `pbpaste`

Power Manager Setting

pmset
pmset sleepnow #sleep the machine immediately

Network

Find info of particular port

sudo lsof -P | grep [PORT_NUM]

Process

Find process using PID
ps aux | grep [PID]
Kill Process with PID
kill [PID]