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Usermod Command
use the usermod command to modify user account properties, such as changing the user's Shell type, the group to which it belongs, the lifetime of the user's password , and the user's login name.
Command syntax:
usermod [ options ] [ user name ]
The meanings of the options in the command are as follows is shown.
table usermod command options meaning
Options |
Meaning |
-G < secondary Group name > |
Modify the secondary group to which the user belongs (additional group) |
-L < new sign-in name > |
Modify user account name |
-L |
Lock the user password to invalidate the password |
-S <shell type > |
After you modify the user login, use the Shell. if not, the system will use the system preset Shell |
-U |
Unlock password |
-U < user uid> |
Modify User Uid |
-C < username Full name > |
Modify the user name of the user account |
-d < master directory ; |
Modify the home directory when the user logs in, If you specify the -m |
-E < expiry date > |
Modify the validity period of the account, plus the user account stop date, the date format is Mm/dd/yy |
-F < expiry date > |
Modify how many days after the password expires the account is closed |
-G < main group name > |
Modify the primary group to which the user belongs, The cluster name must already exist |
-O |
allows the use of duplicate Uid |
-M |
Move the contents of the home directory to a new location |
Example : Modify the user Zhangsan 's home directory to /HOME/KKK, and manually create the/HOME/KKK directory.
[Email protected]~]# usermod-d/home/kkk Zhangsan
[[Email protected]~]# mkdir/home/kkk
You must use the mkdir command to create the/HOME/KKK directory so that the user Zhangsan can use the home directory
Example : Modify the user Wangwu 's home directory to /home/opop, and create the/home/opop directory automatically.
[Email protected]~]# usermod-d/home/opop-m Wangwu
Example : Modify user Wangwu 's login name to Zhaoliu.
[Email protected]~]# usermod-l Zhaoliu Wangwu
Example : User name modified by user Zhangsan is all called Zhang San.
[Email protected]~]# usermod-c Zhang San zhangsan
Example : Modify User Zhangsan the account is disabled after the password expires .
[Email protected]~]# usermod-f Zhangsan
Example : Modify The primary group that the user Zhangsan belongs to as root.
[Email protected]~]# usermod-g Root Zhangsan
Example : Locks the user Zhangsan password to invalidate the password.
[Email protected]~]# usermod-l Zhangsan
Example : Unlock user Zhangsan password.
[Email protected]~]# usermod-u Zhangsan
Example : The expiration date of the modified user Zhangsan account is 2028 year .
[Email protected] ~]# usermod-e 12/12/2028 Zhangsan
Example : The Shell type that modifies user Zhangsan is /bin/ksh.
[Email protected] ~]# usermod-s/bin/ksh Zhangsan
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Usermod Command--linux command application of large dictionary 729 commands interpretation