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This article mainly introduces how to delete user groups in linux. It is very detailed and has a certain reference value. Friends who are interested must read it!

In linux, you can use the groupdel command to delete user groups (groups), that is, data information about target groups in "/ etc/gourp" files and "/ etc/gshadow" files, with the syntax "groupdel group name".

The operating environment of this tutorial: linux5.9.8 system, Dell G3 computer.

Linux is a multi-user and multi-task operating system. In other words, the Linux system supports multiple users logging in at the same time, and different users can perform different tasks without affecting each other.

A user group is a logical collection of users with the same characteristics. To put it simply, sometimes we need to make multiple users have the same permissions, such as viewing and modifying a file. One way is to authorize multiple users to access files separately. If there are 10 users, you need to authorize 10 times. What if there are 100, 1000 or more users?

Obviously, this method is not very reasonable. The best way is to set up a group that has permission to view and modify the file, and then put all users who need to access the file into this group. Then all users have the same permissions as the group, which is the user group.

Grouping users into groups is a means to manage users and control access rights in Linux systems. By defining user groups, many programs simplify the management of users.

The groupdel command is used to delete user groups (groups). The basic format of this command is:

[root@localhost ~] # groupdel group name

To delete a group using the groupdel command is to delete the data information about the target group in the / etc/gourp file and / etc/gshadow file.

For example, for a group group1 created with the groupadd command, execute the command as follows:

[root@localhost ~] # grep "group1" / etc/group / ETC grep group1 etc/group / etc/group / etc/gshadow [root@localhost ~] #

Note that you cannot delete a group at will using the groupdel command. This command applies only to groups that are "not any user's initial group". In other words, if a group is still a user's initial group, you cannot delete it successfully using the groupdel command. For example:

[root@localhost ~] # useradd temp

# run the following command, and you can see that while the temp user is established, the temp group is also created and used as the initial group of the temp user (group ID is 505)

[root@localhost ~] # grep "temp" / etc/passwd / etc/group / EtcGShadowUnix / etc/group / EtcGShadowBash temp group [root@localhost ~] # groupdel tempgroupdel:cannot remove the primary group of user 'temp'

As you can see, the groupdel command failed to delete the temp group with the prompt "cannot delete the initial group of temp users." If you must delete the temp group, either modify the GID of the temp user, that is, change its initial group to another group, or delete the temp user first.

Keep in mind that although we have learned how to delete group data manually, deleting groups indiscriminately can cause a lot of trouble for other users, so you should be extra careful in changing file data.

The above is all the contents of the article "how to delete user groups in linux". Thank you for reading! Hope to share the content to help you, more related knowledge, welcome to follow the industry information channel!

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