Group Creation and User Assignment

To achieve group-based access control, follow these steps across all App servers in the datacenter:

Step 1: Create the Group

Run the following command to create the group named <group_name>. Replace group_name with you actual groupname

sudo groupadd <group_name>

This ensures the group exists before adding users.

Step 2: Create the User (if it doesn't exist)

replace <username> with you actual username Check if the user <username> already exists.

id <username>

If the user does not exist, create it:

sudo useradd -m -s /bin/bash <username>

The -m flag creates a home directory, and -s /bin/bash assigns Bash as the default shell.

Step 3: Add User to the Group

Now, add <username> to <group_name>:

sudo usermod -aG <group_name> <username>

This ensures <username> becomes a member of the group.

Step 4: Verify the Changes

Confirm that <username> has been added successfully:

groups <username>

To verify on multiple servers, you can use SSH to run these commands remotely across all App servers.

Let me know if you need automation scripts or further refinements! 🚀