Linux command: Usermod

Usermod Introduction to Commands:

     Modify user account properties .  

1 . command format:

usermod [option] USERNAME

2 . Command function:

        

3. Command parameters:

-U uid modifies the UID of the user

-G GID Modifying the user's GID must be a group that already exists

-a-g GID : Does not use the-a option to overwrite previous additional groups;

-C Add comment information to the user

-d-m : Specify a new home directory,-M to represent and copy files from the home directory to the new home directory

(Cannot access files without the-M original home directory)

-S Modify the user's login shell

-L Modify the user's login name usermod-l newusername oldusername

- L : Lock Account

- u : Unlock Account

4. Command instance:

1, new user test, password test, plus add usertest Group

#useradd test #echo "Test" | passwd--stdin Test #groupadd usertest

2. Add test user to Usertest Group

#usermod-ag usertest Test # #多个组之间用空格隔开 #id Test uid=500 (Test) gid=500 (test) groups=500 (501)

3, modify the jack user's home directory

[Email protected] test1]# Usermod-md/home/jack Jack

[Email protected] test1]# TAIL-N3/ETC/PASSWD

Oprofile:x:16:16:special user account to being used by Oprofile:/home/oprofile:/sbin/nologin

Donggen:x:500:500::/home/donggen:/bin/bash

jack:x:777:500: User to test user administration commands:/home/jack:/bin/bash home directory has changed to/home/jack

4. Modify User Name

#usermod-L urchin (new user name) test (original user name) #id urchin uid=500 (urchin) gid=500 (test) groups=500 (test), 501 (usertest)

This article is from the "Learn Linux history" blog, please be sure to keep this source http://woyaoxuelinux.blog.51cto.com/5663865/1861120

Linux command: Usermod