user permissions id

基本解釋

The Linux permissions model has two special access modes called suid (set user id) and sgid (set group id).
Linux 權(quán)限模型有兩個(gè)特殊的訪問(wèn)模式，名爲(wèi) suid（設(shè)置用戶 id）和 sgid（設(shè)置組 id）。
The system sets permissions for all the files in an application so that only the user ID assigned to that application can access them.
應(yīng)用中的所有文件訪問(wèn)許可都被系統(tǒng)設(shè)置了此 ID，因此，衹有被分配了該用戶ID的應(yīng)用可以訪問(wèn)這些文件。
Because the numeric IDs of logins are reused, a future login ID will very likely be assigned this numeric ID, and mistakenly gain the permissions of the user ID.
由於登錄的數(shù)字ID重複使用，未來(lái)的登錄ID很可能會(huì)分配此數(shù)字ID，竝錯(cuò)誤地獲得對(duì)用戶ID的權(quán)限。
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