41⟩ What is umask?
umask stands for 'User file creation mask', which determines the settings of a mask that controls which file permissions are set for files and directories when they are created.
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43 Linux Administrator Questions And Answers
42⟩ How to set umask permanently for a user?
To set this value permanently for a user, it has to be put in the appropriate profile file which depends on the default shell of the user.
43⟩ How to change the default run level in linux?
To change the run level we have to edit the file "/etc/inittab" and change initdefault entry ( id:5:initdefault:). Using 'init' command we change the run level temporary like 'init 3′ , this command will move the system in runlevl 3.
