Reseting All Permissions
 

Is there a way I can reset all of my file permissions back to default, as I have been changing them quite a bit, and I don't think some of the changes are safe.

What do you mean by "back to default"?

You could do a sweeping system-wide change of files with "chmod XXX / -r" (as root user), where XXX is the permissions you want to set everything to.

But why on earth would you want to do this?
Every file on your system has unique needs for its permissions, and changing them all to be the default would be a VERY BAD IDEA.

I just want to do it because i've been playing around with permissions trying to get mysql to work.

now i'm a bit worried that my computer is insecure because of all of the changes i've made.