What are SUID and SGID?
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What are SUID and SGID?
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Set user ID (SUID) and Set group ID (SGID) are used to set a file to run as something other than the standard. Normally, when a file is executed, it runs as the user who invokes it. Setting a file to SUID or SGID simply requires adding an extra digit to the permissions. Technically, if no digit is used, it assumes a leading 0.
| 0 | Standard: File runs as the user who invokes it. |
| 2 | SGID: File runs as a member of its group. |
| 4 | SUID: File runs as its owner. |
| 6 | Both SUID and SGID. |
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