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--- usermanagement [2025/01/18 04:28] – created 1211112228
+++ usermanagement [2025/01/19 03:31] (current) – 1211112228
@@ Line 1: / Line 1: @@
 ====== User Management ======
 User management in Linux is a critical aspect of system administration. It involves creating, modifying, and managing user accounts and groups to ensure proper access control, system security, and resource allocation. Each user is assigned a unique identity, along with permissions and restrictions.
+-----
-  * **Change user password**
+Add user:
+  adduser
-  - login to any sudoer group user or root
+Delete user:
-  - Use **//sudo passwd username//** to change user password
+  deluser
-  - Enter new password then you will be ask to retype you new password
-  - Password change
-  -
-{{:screenshot_2025-01-16_144702.png?400|}}
+Add group:
+  groupadd
+Delete group:
+  groupdel
-  * **Manage Password aging and expiration**
+Change user password:
+  passwd
-The **sudo chage** command is used in Linux to manage password aging and expiration policies for a user. It allows administrators to define and control how long a user's password remains valid, enforce password expiration, and specify warnings before password expiration.
+Lock/unlock user password:
+  passwd -l
+  passwd -u
-  - //**sudo chage [option] username**//
+Switch user:
+  su
-  * **sudo chage -l username**
+Show user information:
-Display the current password aging information
+  id
+----
-{{:screenshot_2025-01-16_162659.png?400|}}
+  * **Change user password**
-  * **sudo chage -E  2025-12-31 username**
-Set the account expiration date. The account will be disabled after this date.
-To set account expiration to never use **sudo change -E -1 username**
+. Type this command to change user password.
+  sudo passwd username
-{{:date.png?400|}}
+. Enter new password. Then, you will be ask to retype your new password.
-  * **sudo chage -W 7 username**
+. Your password is changed successfully.
-The user will receive a warning 7 days before the password expires.
-{{:date.png?400|}}
+{{:screenshot_2025-01-16_144702.png?nolink&600|}}
+  * **Manage password aging and expiration**
+The ''sudo chage'' command is used in Linux to manage password aging and expiration policies for a user. It allows administrators to define and control how long a user's password remains valid, enforce password expiration, and specify warnings before password expiration.
+The syntax is: ''sudo chage [option] username''
+. Displays the current password aging information.
+  sudo chage -l username
+{{:screenshot_2025-01-16_162659.png?nolink&600|}}
+. Set the account expiration date.
+  sudo chage -E  2025-12-31 username
+{{:date.png?nolink&600|}}
+The account will be disabled after this 2025-12-31. To set account expiration to **never:**
+  sudo change -E -1 username
+. Set a warning to the user 7 days before the password expires.
+  sudo chage -W 7 username
+{{:date.png?nolink&600|}}
+-----
+Good user management is essential to make sure your system stay secure from unknown intruders.