How I can get backup for any account on my server?
My server make backup weekly.

up...up

backup

You should ask your provider. It's too general a question for this forum, as there are any number of ways backups could be configured.

tar xvzf /dev/<tape backup devide> filename


This will extract a file in your tape backup device to current directory.

Leave out the "filename" and everything on your backup device will be extracted to your current directory.

If it is a .tgz file, you can use:

tar xvzf archive.tgz filename

archive.tgz is your tar. ( zipped archive)
filename is the specific file you are looking for.

If you want to get everything owns by a user, try this:

find /home -user [user-id#] -type f -print


All of user accounts, beside root, are in /home or whatever you call it. You don't need to put /home, but it will save you time, because I don't think you want it to search your whole system while you know it is somewhere in home. -user [user-id#] is to find everything owns by that user. -type f is finding the files of that user. -print is to print out in the screen. You can leave out -print and it'll still do the same thing.

Hope that helps :D