What are setuid/setgid in relation to file permissions?

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What are setuid/setgid in relation to file permissions?..

Answer / chinavenkanna babu

setuid:When setuid permission is set to an executable
file,if the user runs this executable file he is granted
access based on the owner of the file instead of who
started an executable file.we can set the setuid permission
on file # chmod 4555 executable_file

setgid:when setgid permission is set to the file in a
directory,the file belongs to the same group in which the
directory is a member.we can set the setgid permission on
file # chmod 2555 executable_file

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What are setuid/setgid in relation to file permissions?..

Answer / p kumar

Setuid:If it is set on an executable file,cause it to run
under the user...
For example:/etc/passwd file is owned by root whici have
only read permision .....It will store all uaers encrypted
password..but users can still change their passwprd using
#passwd command ,,,bcz set uid bit is set for this file,,,
#ls -l /etc/passwd====it will show -wr--------s
#chmod u+s dirname

Stickybit:If it is set on a directory only the owner of a
file can delate the file.......only 4 directories...
/tmp dir iset by sticky bit....bcz any users can create &
delete file....but 2 prevent users from deleting each
others file...
#chmod o+t dirname....

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1 No

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