Im worried about it leaking out under the mold.
Common problem. 1st coat needs a light sanding. Then apply a 2nd coat. Bubbles will form in 2nd coat also but usually (hopefully) they should disappear on drying. If not, repeat the process. (The bubbles are comming from gasses escaping from a reaction in the wood. 1st coat should stop that. If not, 2nd coat should, ect. Depends largely upon wood species. Anyway, more coats look better!
Unix is older than Windows, and has less granularity when it comes to ACLs. I don't know how much detail you want, or how technical you want the explanation to be, but there's a thorough overview of the POSIX ACL model at suse.de/~agruen/acl/linux-acl
basically being a root user gives you full control of all your system, being a user only gives you limited access being root is the same as admin, you need to be root to install and uninstall software (for example), as it involves changing protected system files, being a user does not mean you cannot use any program on your system, but you cannot make system wide changes, the root user concept is why linux is so secure, unlike a certain other operating system where the admin account is enabled by default, there are also different ways to be root on different linux distributions, on my system i can login as root, i can su to root through my user account via a terminal or i can enter mcc via my user account which gives me root access, in a nutshell thats it
