Usermod Command--linux command application of large dictionary 729 commands interpretation

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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