Linux-user management, linux User List

Linux-user management, linux User List

Add User:

Useradd [options] Jack

-U 1000, specify UID

-G 1000: Specify the GID (basic group). The Group must exist.

-G gid (additional group), the Group must exist.

-C: Specify the annotation information.

-D/home/Jack: Specifies the home Directory

-S/bin/tcsh: Specifies the shell path.

-M-k: create a home directory

-M: No home directory is created.

 

/Etc/shells, specifying the Security shell available for the current system

/Etc/login. defs,

/Etc/skel/, bash environment configuration file

 

Delete A User:

Userdel [options] Jack, delete the user, but do not delete the Home Directory

-R: Delete the home directory at the same time.

 

Id to view the user's account attributes

Id user1

-U, UID

-G, GID, basic group

-G, GID, additional group

-N, name, name

 

Finger Jack, view User Account Information

 

Modify user

Usermod [options] Jack

-U UID

-G GID. The changed basic group must exist.

-G gid. If the-a option is not used, the additional group will be overwritten;

-A, append, append

-D,-m: Specify the new home directory and move the files in the original home directory to the new home directory.

-S, shell

-L, login name, Change User name

-L, lock, lock the user

-U, unlock, unlock user

 

Chsh: change shell, modify the user's shell Information

Chfn: change finger, modify comment information

 

Password Management:

Passwd Jack

-- Stdin, standard input, from keyboard

Echo "RedHat" | passwd -- stdin Jack

-L, lock, lock the user

-U, unlock, unlock user

-D: Delete the user password.

PAM: