Terminal Commands useful on a daily basis

Terminal Commands

1. Trim terminal path: 
  PS1='\u:\W\$ '
  OR
  PS1='\W\$ '
  
2. Go to previous directory: 
  cd -
 
3. Kill Port process and free it:
  sudo lsof -i :3000
  // Assume it gave you 32122 port ID, then
  kill -9 32122
  
4. cURL GET, POST, PUT, DELETE requests:
  // GET
  curl http://localhost:3000 
  // POST
  curl -d 'buy pills' http://localhost:3000 
  // PUT
  curl -X PUT http://localhost:3000/0?item=buy%20grocery
  // DELETE
  curl -X "DELETE" http://localhost:3000/1
  
5. Running Services - Ubuntu
  service --status-all
  
6.