What is Linux for the MS-DOS tree command?

"There is also a Linux command tree. But it doesn't always come pre installed.

If you are using Ubuntu (or a Debian based distro) you can install the tree command by typing

sudo apt-get install tree

Or for other distros or if you want the source code, you can check out the Tree homepage

[If you're interested, it's written by a guy called Steve Baker and his site is here]"