Change the IP address and connect your system with new IP address

  1. How to connect with the system if IP address is changed [could you please let me know by command line only]?
  2. How to know the interface if it is wifi lan driver.

I am not able to see the interface eth0 or eth1. It shows wlp60 (after 6, it is zero, not english word, o)

Thanks and Have a Great Day!