Setuid setgid sticky

SETUID:

Features: ability to execute file as owner

chmod 4760 regextest.pl - this will ensure that the perl script always executes as the user 'linuxcbt'

-rwsrw---- 1 linuxcbt sales 787 Jan 13 16:08 regextest.pl

's' in the execute position means that the program will execute as that user

SETGID:

Features:Ability to enforce permissions to a directory structure

mkdir /sales

chmod 2775 /sales

Create a file in the '/sales' directory as 'linuxcbt'

seq 1000000 > linuxcbt.1million.txt

chgrp:

Permits updating of group permissions

Sticky Bit:

Features:Ability to ensure that users cannot delete others' files in a directory

drwxrwxrwt 23 root root 4096 Jan 13 15:05 /tmp/

/tmp - users cannot delete other user's files in '/tmp'

chmod 3777 /sales - ensures that /sales will not lose files from incorrect users

Task:

1. Set '/sales' using sticky bit and test

a. chmod 3777 /sales && ls -ld /sales OR chmod 777 /sales && chmod +t /sales

6.2. Textual representation

SUID	If set, then replaces "x" in the owner permissions to "s", if owner has execute permissions, or to "S" otherwise. Examples: -rws------ both owner execute and SUID are set -r-S------ SUID is set, but owner execute is not set
SGID	If set, then replaces "x" in the group permissions to "s", if group has execute permissions, or to "S" otherwise. Examples: -rwxrws--- both group execute and SGID are set -rwxr-S--- SGID is set, but group execute is not set
Sticky	If set, then replaces "x" in the others permissions to "t", if others have execute permissions, or to "T" otherwise. Examples: -rwxrwxrwt both others execute and sticky bit are set -rwxrwxr-T sticky bit is set, but others execute is not set