What is the command to display the shell's name in UNIX?

Question

It's "something" $SHELL, I just can't remember it!

Answer 1

its echo $SHELL or possibly print $SHELL

you can also (often) tell by the default $PS1 text

Answer 2

Try echo $SHELL or ps

Answer 3

echo $SHELL

Answer 4

echo $SHELL is the most common and POSIX compatible option but some, such as the korn shell, prefer print $SHELL for performance reasons.