Linux System File Management User Group Operations Command Summary

1. view commands for file contents

Cat TAC less more head tail

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2. actions for users and Groups

Useradd -New User

-U-Specify UID when creating new user

-G-Specify user default group when new user

-G-Specify user-attached groups

-S-Specify user login Shell

-D-Specify user plus directory

Default group: There is only one

Additional groups: You can have more than one

Usermod -Modify User Properties

-U-Modify User uid

-G-Modify user default group

-G-Modify user Attach Group

-ag-Append user additional groups

-S-Modify user login Shell

-D-Modify user home directory

Userdel -Delete User

-R-Delete all user files

passwd -Set Password

Groupadd -Add Group

-G-Specify GID

Groupmod -Modify Group Properties

-G-Modify GID

Groupdel Delete a group, if there are users in the group, you need to change the user's group to a different group first.

Chage Modify the account and password for a limited period

ID Displays the ID of the user and the ID of the owning group

Grpconv used to turn on the group's projection password

Pwunconv to turn off the user's projection password

Nologin Deny user Login

CHPASSWD Tools for batch update of user passwords

GRPCK used to verify the integrity of a group file

CHSB used to replace the shell used when logging in to the system

GPASSWD management tools for workgroup files under Linux

Pwck used to verify the contents and format and integrity of system authentication files

NewUsers for batching How to create multiple commands at once

LogName used to display user names

Groups used to print the workgroup to which the specified user belongs

Finger used to find and display user information

Linux System File Management User Group Operations Command Summary