Linux allows simultaneous logons onto a single machine just like Windows XP. But it is not user friendly as installation, like IIS, need to be done by typing which quite troublesome. I had a few programs that is running on the server that sometimes needs to reactivate when they jam. I won't be free the whole day to take care of the server, so instead i ask some people to take care of it when i'm not around. So i also create a user account to run these program. Since i had set the user account only able to read and excute, I won't be able to modify the files. And so when I need to modify some files, i ought to log out and log in as administrator in order to modify the files. But i need to programs to be running while i edit the required files. What can i do about this? Trust my helpers while creating an account to has full control? But i don't want him/her to edit or touch the files in server since he/she only has to reactivate the programs when jam. Let me know if any part of my situation isn't clear.