- Find out what processes are running
ps aux
- Kill one of those bad boys ^
kill -9 <PID>
- Find out what's using a certain port
lsof -i :<port_number>
- Connect to servers for quick testing etc
telnet 127.0.0.1 6379
<- This would connect to locally running Redis instance
- Grep
find / | grep -i <thing>
- Info on a certain process / service
ps auxww|grep [m]ysqld