Linux Add user information, modify user information

Linux operating system create user can set user information, set the specified Uid,gid, user notes information, specify login shell, specify home directory, can set up and modify a lot of content.

such as the following actions

useradd [Options] Username

Useradd-u username Specify UID to establish user

Useradd-u 1111 Tom

USERADD-G username specify GID to establish user

Useradd-g 1111 Jim

USERADD-C username Specify annotation information to establish a user

Useradd-c "My name is Hello" Hello

useradd-d username Specify the home directory to establish the user

useradd-d/hh hh

Useradd-s username Specify shell to establish user

Useradd-s/sbin/nologin H1

Useradd-g GID username Specifies an additional group that must have an existing GID

Useradd-g 1111 H2

Useradd-r Creating a System User

Useradd-r H3

Useradd-m do not create home directories for users

Useradd-m h4

Useradd-m must create a home directory for the user

Modify the user's specified information, also can be modified

usermod [Options] Username

[Options] is an optional option that specifies the user's information

Usermod-u UID Username Modify UID

Usermod-u 1100 Q1

Usermod-g GID username Modify gid

Usermod-g 1111 Q2

Usermod-g GID Username Modify additional groups add user names to the group where the group ID is located

USERMOD-G 1111 Q3

Usermod-c "INFO" username Modify note information

Usermod-c "This is Q4" Q4

Usermod-s/bin/shells username Modify user Default shell

Usermod-s/sbin/nologin/q5

Usermod-l newname Username Modify user Name

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Linux Add user information, modify user information