For ln? It's implicit to put the link in the current directory, I believe. One familiar with linguistics might call it the null morpheme in the ln invocation...
Oh dear Lord!
Now I'm really confused about that period. I actually lost sleep last night about your explaination. I have to admit I'm envious of your obvious understanding of Linux.
I can't for the life of me understand what you just explained. I went into my .bash_history file and found that when I created the symbolic link I used "ln -s /usr/local/Adobe/Acrobat7.0/bin/acroread acroread". Which was pretty cool because the way you did it is easier (I also did that command from within /usr/bin).
So I deleted my acroread link and did it your way and launched acroread fron another console. Of course it launched.as expected. Then for the heck of it I deleted it once more and did the very same command without the period. There was no complaints afterwards and acroread launched the same as before. So that got me even more puzzled.
So that got me on Google for a couple hours this morning trying to find whatever I could about using a period with ln. Perhaps I used the wrong keywords, but I couldn't find anything. So then I searched about setting up a symbolic link with acroread and found many different ways go go about it, but none of them had a period.
Now please understand I am in no way doubting your knowledge or expertise, but am interested in doing things the correct way. And even more... I have to understand the logic involved in it. If you could point me to more info on this I would be grateful, because I can't seem to find it.
I need to get out more, rather than obsessing about silly stuff! lol