Answer Posted / rithi
setuid short for set user ID upon execution is Unix access
rights flag that allow users to run an executable with the
permissions of the executable's owner. This is often used to
allow users on a computer system to run programs with
temporarily elevated privileges in order to perform a
specific task. While the assumed user id privileges provided
are not always elevated, at a minimum that is specific.
setuid and setgid are needed for tasks that require higher
privileges than those which a common user has, such as
changing his or her login password. Some of the tasks that
require elevated privileges may not immediately be obvious,
though — such as the ping command, which must send and
listen for control packets on a network interface.
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