The Linux permissions model has two special access modes called suid (set user id) and sgid (set group id).

Linux权限模型有两个特殊的访问模式，名为suid(设置用户id)和sgid(设置组id)。

youdao

I set up a special concern to you, you can set the access permissions for me, this is the distance.

我对你设置了特别关心，你却对我设置了访问权限，这就是距离。

youdao