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Windows XP has a small option called Run as command.. You can add similar option to Linux desktop to open or run file as root via a right click. The following tutorial explains how to add a context menu item that enables a Linux user to open files as the root user when browsing their file system using nautilus. This script feature allows the user to navigate their file system and open or edit any file or directory as the root user of the system. It's a perfect solution for those that are not completely comfortable using terminal commands.

=> How to open files as root via a right click

Almost all UNIX SystemV version has killall command which is used to kill all active processes i.e. terminates all processes with open files so that the mounted file systems will be unbusied and can be unmounted.

However Linux killall command used to kill processes by name (if no signal name is specified, SIGTERM is sent). If you missed old good SysV killall command, try killall5 command under any Linux distro. killall5 is nothing but the UNIX SystemV killall command. It sends a signal to all processes except kernel threads and the processes in its own session, so it won’t kill the shell that is running the script it was called from.

Just type killall5 and every active process will get killed except your login session:
# netstat
# netstat -tulpn
# killall5
# netstat -tulpn

As usual,
(a) The killall command can be run only by the super-user.
(b) Use this command with caution