When processes are managed, two concepts come up, they are the Real and the Effective ID of the process. To detail the difference, you have to understand the Difference between setuid / setgid / sticky bits.
The Real ID is the ID of the user that started the process, suppose that the process was started [...]

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To change a file permission the “chmod” command is used. This command has the following format in Solaris:
chmod [-fR] <permissions> <fileName>
-f : Is to force, if there is an error, nothing is displayed.
-R : Does the change recursivelly.
But let go to the point, the setuid bit permits that the process, produced by executing the [...]

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