<> Management of users and groups
<> user :
/etc/passwd User managed profiles
System users : Used to manage and run services , Login is not allowed by default /sbin/nologin
Ordinary users : Self created users .
1. Add user
command :useradd( If you do not specify a group , Will be assigned a UID Private group of )
2. Modify user information
3. Modify user home directory
method 1:
Create home directory while creating user
method 2:
If the user is not created at the same time as the user is created , At this time, switching users will fail
The following operations are required :
4. delete user
userdel -r qwe -r Delete the home directory and mailbox assigned by the user
<> group :
/etc/group
Classification of groups
Private group : When creating a user , If no base group is specified for this user , Then the user will automatically assign the same user uid Private group of .
Basic group :
Additional group : Except for the basic group , Users can also be assigned to other groups .
Create group
Landing group
Modification group
delete group
groupdel
Add user group
gpasswd zuming Set password for group
gpasswd -a maomao zu1( Group name ) Add group to user
gpasswd -M xixi,haha,maomao zu2 To add multiple users to a group in the form of a specified list
usermod -G zu1 maomao to maomao Users add additional groups
vim /etc/group Modify configuration file , Add the user name to the group's configuration file .
gpasswd -A maomao Designated team leader
gpasswd -d haha zu1 take haha User from zu1 Remove from
vim /etc/group Modify configuration file , Add the user name to the group's configuration file .
gpasswd -A maomao Designated team leader
gpasswd -d haha zu1 take haha User from zu1 Remove from
gpasswd -R zu1 Lock specified group , Only group members can enter this group
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