Su Must Be Suid To Work Properly < POPULAR ◎ >

This issue frequently occurs in environments where security or image size is prioritized over standard functionality.

The answer lies in the very nature of how Linux handles permissions, process credentials, and the "privilege paradox." Without the SUID bit, su is rendered useless. This article explores the mechanics of SUID, the kernel’s role in permission checks, and why su is the definitive example of a necessary security exception. su must be suid to work properly