Execute more than one commands

Executing the second command only if the first is successful

To do this you would type: command1 && command2

command2 will be executed if command1 successfully completes (if command1 fails command2 won't be run). This is called a logical AND.

Executing the second command only if the first fails

To do this you would type: command1 || command2

command2 will be executed if command1 does not successfully completes (if command1 is successful command2 won't be run). This is called a logical OR.

Executing commands sequentially

To execute command sequentially regardless of the success/failure of the previous you simply type: command1; command2

command2 will execute once command1 has completed.