Linux uses commands to add the same user to multiple groups

Using the Usermod command in the RHEL7.2 system to add a user to multiple additional groups, by default, adding multiple additional groups at once can be added in the following ways:

Usermod-g Additional Group 1, additional Group 2, ..., additional group N user name

Instance

[Email protected] ~]# Useradd MK

[[email protected] ~]# ID MK

uid=1159 (MK) gid=1159 (MK) group =1159 (MK)

[Email protected] ~]# Groupadd Mk1

[Email protected] ~]# Groupadd Mk2

[Email protected] ~]# Groupadd Mk3

[Email protected] ~]# Usermod-g Mk1,mk2,mk3 mk

[[email protected] ~]# ID MK

uid=1159 (MK) gid=1159 (MK) group =1159 (MK), 1161 (MK1), 1162 (Mk2), 1163 (MK3)

However, if you add additional groups to the user after adding them, use the

Usermod-g additional group name User name

Will overwrite the user's previous additional group. At this point, you can add a parameter- A to the Usermod command.

Usermod-a-G Additional Group name user name

Instance

[[email protected] ~]# ID Top

uid=1034 (top) gid=1034 (top) group =1034 (top), (Don)

[Email protected] ~]# Usermod-g MK Top

[[email protected] ~]# ID Top

uid=1034 (top) gid=1034 (top) group =1034 (top), 1159 (MK)

[Email protected] ~]# usermod-a-G Don Top

[[email protected] ~]# ID Top

uid=1034 (top) gid=1034 (top) group =1034 (top), (Don), 1159 (MK)

This article is from a "non-secure" blog, so be sure to keep this source http://renzhe27.blog.51cto.com/1735477/1763734

Linux uses commands to add the same user to multiple groups