Combining commands

Question 1

Invoke several commands in sequence on single command line?

Answer 1

command1; command2; command3

Question 2

Invoke several commands in sequence but stop execution if any of them fails?

Answer 2

command1 && command2 && command3

Question 3

Invoke several commands in sequence and stop as soon as one of them succeeds?

Answer 3

command1 || command2 || command3