[Linux user and group management] --2019-08-07 12:51:16

Original: http://106.13.73.98/__/90/

Create a user -useradd

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Command Format:useradd [参数] 用户名
useradd can also be written adduser
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Parameters are as follows

1. -u Specifies the UID number
2. -d Specifies the home directory
3. -e Specifies the effective time
4. -g Specify the basic group
5. -G Specify additional group
6. -M Does not create host directories
7. -s Specifies the shell
8. -r When used to delete a user, delete the home directory
9. -f Generally used to force a user to delete

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Complementary command:
echo '密码' | passwd --stdin 用户名set a password directly to a specific user

Set user password -passwd

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Format:passed [参数] 用户名
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Parameters are as follows

1. -d Empty password
2. -lLock the user, locking labeled LK, through the parameters -Sview
3. -u Unlock the user to unlock labeledPS
4. -S Uppercase, see the user status

Change User Properties -usermod

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Command Format:usermod 参数 用户名
the usermod command with all the parameters of useradd.
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Also contains the following parameters parameters

1. -l Change User
2. -L Lock the user
3. -U Unlock user

Group Management -groupadd

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Creating a group:groupadd [-g GID] 组名
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Parameters are as follows

1. -u Add a member
2. -d Remove a member
3. -MRedefine the list of group members to ,separate

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To delete a group:groupdel 组名

Check user information

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id 用户名Check user identity mark
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groups 用户名Charles groups the user belongs
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users/ w/who Check the logged-in user information
***

user

• Superuser (root): UID and GID are0
• Program User: UID is 1-499usually no home directory
• Average user: UID as the 500-6000default start accumulating from 1001

group

• The basic group (private group): Each user belongs to a private group the largest private group can not be deleted
• Additional groups (Public Group) : Each user can belong to any common group

Related documents

. Basic user information file storage format: . User shadow password file, used to store password information . Ordinary user's home directory, usually the user name their files from / copied from the . Group information file
/etc/passwd

用户名:密码占位符:UID:GID:描述信息:宿主目录:登陆shell

/etc/shadow


/home/文件名

/etc/skel

/etc/group

Original: http://106.13.73.98/__/90/