December 2018
Beginner
452 pages
12h 17m
English
Content preview from Learn Linux Shell Scripting - Fundamentals of Bash 4.4
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Special file permissions
As you might have noticed in the part about octal notation, we always start the notation with a zero (0775, 0640, and so on). Why do we include the zero if we do not use it? That position is reserved for special file permissions: SUID, SGID, and the sticky bit. They have a similar octal notation (where SUID is 4, SGID is 2, and the sticky bit is 1) and are used in the following manner:
|
Files |
Directories |
|
|
SUID |
Files are executed with the permissions of the owner, regardless of which user executes it. |
Does nothing. |
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SGID |
Files are executed with the permissions of the group, regardless of which user executes it. |
Files that are created in this directory get the same group as the directory. |
|
Sticky ... |
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