Here's an example. vi is in
/usr/bin/vi . You want a sym link to point to it from the same directory called vii. While in /usr/bin, you would type:
ln -s vi vii
You could specify absolute pathnames as well, so if you wanted a sym link called 'vi' in /usr/local/bin pointing to /usr/bin/vi , if you were in /usr/local/bin, you could type:
ln -s /usr/bin/vi vi
Does this make sense?