Hi SIMMS7400 & Robin,
As Robin said, cd ~ (which is what aksdixs's script was using), cd "$HOME", and cd all change directory to the user's home directory (unless something has unset HOME or set it to some other value).

In addition to using cd ~/directory to change to a directory in your home directory, you can also use cd ~user to change directory to the home directory of the user whose login ID is user and

Code:

cd ~user/some/directory

to change to some/directory in user's home directory. Of course, any of these may fail if user's home directory does not grant you search permission.

After a successful cd some/directory, the commands cd - and cd "$OLDPWD" will return you to the directory you were in before the previous cd command unless something has unset OLDPWD or set it to some other value). The OLDPWD variable maintained by the shell gives you one and only one level of what pushd and popd do on multiple levels in some shells (including csh and some versions of bash). But dirs, pushd, and popd are not defined by the standards and are not available in many shells.

Hope this helps,
Don