□ SUID = SetUID : Special permission of a file(4000)
□ SUID(=Saved set-user-ID) : One of the UID of a process
※ The UID of a process : RUID, EUID, SUID, FSUID
□ SUID = SetUID : Special permission of a file(4000)
□ SUID(=Saved set-user-ID) : One of the UID of a process