Create an ec2 instance and download the key as a .pem file
Make directory Shell and change directory to Shell
mkdir Shell && cd Shell
Create a csv file and write in 20 names of new users
touch names.csv
create an id_rsa id_rsa.pub
touch id_rsa id_rsa.pub
Open the id_rsa file and populate it with the code below
vi id_rsa
-----BEGIN OPENSSH PRIVATE KEY-----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-----END OPENSSH PRIVATE KEY-----
open the id_rsa.pub file and populate it with the public key
vi id_rsa.pub
ssh-rsa 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
Create a script as pushed in this repository as onboard.sh
Create Developers group
sudo add developers
To be able to run the onboard.sh file, Run
chmod +x onboard.sh
Let us try to run a command without the sudo command to see if we can run the command
./onboard.sh
Switch to root user
sudo su
You are now in root folder
run the command
./onboard.sh
The image above shows the users have been created according to the script written
Let us get a more organised details on the users onboarded. Run
ls -l /home/
Let us confirm the developer group has been created . Run
getent group developers
The group has been created and assigned an id according to the above image
Open a new terminal and cd into the directory containing the download keypair from ec2 instance
cd Downloads
We will create a public key for connecting to the instance for all users
touch auxkey.pem
Open with vi editor and populate it with the public key
vi auxkey.pem
Test user by running
ssh -i <keypair> <user>@<Public key or Local DNS host> and hit Enter
if the public key exposure error comes up
Protect it by running
chmod 600 <keypair>
Confirm the .ssh file was created
ls la
Run also see the content of the .ssh file, Run
ls la .ssh/
You can use cat .ssh/authorized_key to see the content of the authorised key folder
End