From the Links v2 readme.txt file:
Code:
3. Set permissions:
chmod 755 (-rwxr-xr-x) on all .cgi files.
chmod 666 (-rw-rw-rw-) on all files in the data directory.
chmod 666 (-rw-rw-rw-) on all your template files (if using the online editor).
chmod 777 (drwxrwxrwx) on the hits directory
chmod 777 (drwxrwxrwx) on the ratings directory
chmod 777 (drwxrwxrwx) on the directory where Links pages will be created.
All other files would default to system settings.
I hope this helps.