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--- commands [2025/01/03 12:02] – created 1211112228
+++ commands [2025/01/17 16:54] (current) – 1211112319
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 ====== How to create and delete users ======
+ We use **//sudo adduser username//** to create a new user\\
+ Sudo command must be used by sudoer user only.\\
+ If you want to assign the user to a group for example sudo group you can use **//sudo adduser username sudo//**
+  * How to create a user:
+. Fisrt User: myself
+  - Ordered List ItemFirst make sure your are using a sudoer group user or root to perform sudo command.
+  - Then use **//sudo adduser aidel//**
+  - Then you will need to insert your password which i insert **//aidel//** as the password
+  - Then you will have to insert the details of the user such as full name, group and phone number
+  - system will ask whether the information is correct or not, if yes press y
+{{:whatsapp_image_2025-01-11_at_23.25.16_49f8450a.jpg?400|}}
+{{:whatsapp_image_2025-01-11_at_23.27.10_a5e04d49.jpg?400|}}
+{{:whatsapp_image_2025-01-11_at_23.27.36_932162f4.jpg?400|}}
+**//EXTRA//**\\
+ Add user //aidel// to sudo group\\
+  * use **//sudo adduser username sudo//**
+{{:whatsapp_image_2025-01-12_at_13.28.50_2303cca1.jpg?400|}}
+. Second User: John Doe
+- Ordered List ItemFirst make sure your are using a sudoer group user or root to perform sudo command.
+  - Then use **//sudo adduser jdoe//**
+  - Then you will need to insert your password which i insert **//sysadmin#1//** as the password
+  - Then you will have to insert the details of the user such as full name, group and phone number
+  - system will ask whether the information is correct or not, if yes press y
+{{:whatsapp_image_2025-01-11_at_23.31.33_e41cae74.jpg?400|}}
+{{:whatsapp_image_2025-01-11_at_23.31.55_6b63b9c6.jpg?400|}}
+. Second User: Will Smith
+- Ordered List ItemFirst make sure your are using a sudoer group user or root to perform sudo command.
+  - Then use **//sudo adduser wsmith//**
+  - Then you will need to insert your password which i insert **//sysadmin#2//** as the password
+  - Then you will have to insert the details of the user such as full name, group and phone number
+  - system will ask whether the information is correct or not, if yes press y
+{{:whatsapp_image_2025-01-11_at_23.35.44_5a16cf90.jpg?400|}}
+{{:whatsapp_image_2025-01-11_at_23.36.15_47c2b88d.jpg?400|}}
+.Check the user
+  - Use **//cat /etc/passwd//**
+  - it will appear the name of the user and the details
+{{:whatsapp_image_2025-01-11_at_23.37.20_98252dfd.jpg?400|}}
+  * How to delete user
+  - Use **//sudo userdel username//** to delete user.
+  - In this case i use **//sudo userdel aidel//** to delete user //**aidel**//
+  - Use **//cat /etc/passwd//** to check again the list of user
+  - Previously it will display user aidel details now after delete user aidel no longer exist
+{{:whatsapp_image_2025-01-12_at_13.20.40_6f6cec9d.jpg?400|}}
+{{:whatsapp_image_2025-01-12_at_13.19.59_ab381a49.jpg?400|}}
+  * Delete User and Home Directory
+**-r**: Recursively removes the user’s home directory and mail spool.
+{{:screenshot_2025-01-12_191951.png?400|}}
+  *  Force Deletion
+**-f**: Forces the removal of the user account, kills processes, and deletes files.
+{{:screenshot_2025-01-12_192405.png?400|}}
+  * Lock User Before Deleting
+Locks the user's account before deletion to ensure no one logs in during the process.
+**//EXTRA//**
+ {{:screenshot_2025-01-12_193134.png?400|}}
+====== 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**
+  - login to any sudoer group user or root
+  - Use **//sudo passwd username//** to change user password
+  - Enter new password then you will be ask to retype you new password
+  - Password change
+  -
+{{:screenshot_2025-01-16_144702.png?400|}}
+  * **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.
+  - //**sudo chage [option] username**//
+  * **sudo chage -l username**
+Display the current password aging information
+{{:screenshot_2025-01-16_162659.png?400|}}
+  * **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**
+{{:date.png?400|}}
+  * **sudo chage -W 7 username**
+The user will receive a warning 7 days before the password expires.
+{{:date.png?400|}}