SUID

SUID、SGID 概念 The Unix access rights flags setuid and setgid (short for “set user ID” and “set group ID”) allow users to run an executable with the file system permissions of the executable’s owner or group respectively and to change behaviour in directories. They are often used to allow users on a computer system to run programs with temporarily（暂时、临时） elevated（提高） privileges in order to perform a specific task. While the assumed user id or group id privileges provided are not always elevated, at a minimum they are specific....