check user id linux

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

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

Linux User and User Group Management Linux is a multi-user multi-task time-sharing operating system. any user who wants to use system resources must first apply for an account from the system administrator and then enter the system as the

Groups viewing the members of the currently logged on user groupGroups Gliethttp View the group that the Gliethttp user is in, and the members in the groupWHOAMI View the currently logged in user name/etc/group file contains all groupsAll user names

Groups viewing the members of the currently logged on user groupGroups Gliethttp View the group that the Gliethttp user is in, and the members in the groupWHOAMI View the currently logged in user name/etc/group file contains all groupsAll user names

Linux system is a multi-user multi-tasking time-sharing system, any user who wants to use system resources must first request an account from the system administrator and then enter the system as this account. On the one hand, the user's account can

These concepts are often encountered when looking at Unix-related books, but have not been able to properly clarify these concepts, so that they have been a smattering of these concepts. Today, a good distinction between these concepts and

Linux system is a multi-user multi-tasking time-sharing system, any user who wants to use system resources must first request an account from the system administrator and then enter the system as this account.On the one hand, the user's account can

1. User and user group filesIn Linux, user accounts, user passwords, user group information, and user group passwords are stored in different configuration files.In a Linux system, the user account that is created and its associated information