linux user id

No dead corners understanding Save settings user ID, Set User ID bit, valid user ID, actual user ID, dead corner Save settings Recently, I encountered some problems when I understood how to save and set the user ID, but I found that I was not able

First, the basic conceptactual user ID (ruid): used to identify who the user is in a system, usually after logging in, is uniquely determined, is the UID of the logged-on user.Valid User ID (EUID): used by the system to determine the user's

Actual User ID (actual group ID): Identifies who the current user (belongs to) is and is taken from the password file when the user logs on.Valid user ID (valid group ID): Used to determine our (current process) access to the file (that is, the

Actual user ID, valid user ID, and set user ID   These concepts are often encountered when reading Unix-related books, but these concepts have not been properly clarified, so that they have been completely understood. I have made a distinction

Transferred from: http://www.cnblogs.com/kunhu/p/3699883.htmlMultiple user IDs and user group IDs are involved in the UNIX process, including the following:1. Actual user ID and actual user group ID: identify who I am. That is, the UID and GID of

Real User id: Actual username, refers to who the process performer is Effective User ID: Valid user ID, which is the access to the file when the process executes Saved Set-user-id: Save the Set User ID as a copy of the effective user ID, which

Actual User (group) ID:Identifies who the user is, and the two fields are taken from the login entry in the password file when they log on.Valid user (group) ID:Determines access to the file, usually valid user (group) ID equals the actual user

To log in to a computer, we need a username. A user name is an identity that can be recognized by a computer. Based on this, the computer applies a series of rules to people who log on with this user name. Under the Linux system, we can use the ID

Linux is a multi-user and multi-task time-sharing operating system. UserYou must first apply for an account from the system administrator and then enter the system as this account. The user's account helps the system administrator UserTracking and

Excerpted from http://blog.csdn.net/guosha/article/details/2679334Actual user ID, valid user ID, and set user IDRead UNIX-related books often encounter these concepts, but has not been properly to clarify these concepts, so that these concepts have