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For some posts in the forum, I see the Edit and Delete buttons. For some other posts, I only see Reply. Why is that?
Two reasons can explain this situation. First, you will see the Edit button if you are the poster of the message. Second, you will see the Delete button if you are the moderator of the forum in which the message was posted.
On *NIX systems, you can use symbolic links (ln -s) to link your cache, templates_c, and uploads directories to folders that are outside of your web root.