SUID or SGID special permissions are represented with this letter in the user or group owner's execute position is S
What is SUID and SGID?
- SUID: It is special file permission for executable files. This enables other users to run the file with the effective permissions of the file owner. But Instead of normal x which represents executable permissions. We will see s(this indicates SUID) special permission for the user.
- SGID: This is also special file permission for executable files that enables other users to inherit the effective GID(Group Identifier) of a group owner. Here rather than x which represents executable permissions, we will see s(which indicates SGID) special permission for group users
Learn more about SUID and SGID refer:
https://www.geeksforgeeks.org/finding-files-with-suid-and-sgid-permissions-in-linux/
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