Configuring users for limited simultaneous access

Goal: To prevent a user from having more than one login session at a time.

Time: 20-35 minutes

Files:

For this exercise, you are assumed to have previously worked through, and be familiar with, the accounting exercise from Accounting, and to have an entry in the file, as given the exercise in New User, for user "bob".

In this exercise, youwill work through an example of a user logging into the server, and then attempting a simultaneous login for a second session, while still logged in for the first session.

You should run the bob-login-one.sh and bob-acct-start.sh scripts, to simulate a successful user login. You should check the database to verify that the server knows that the user is logged in.

You should then run the bob-login-two.sh, and observe that the second authentication request succeeds. The login record should be removed through running the bob-acct-stop.sh script, and check the database to verify that no one is currently logged in.

you should now read the Simultaneous-Use file in the documentation directory, to determine how to limit a user to only one login at a time. The "bob" entry in the file should then be edited, to add the limitation that "bob" may only have one login session at a time.

The scripts bob-login-one.sh and bob-acct-start.sh should be run again, to simulate a successful user login. The bob-login-two.sh script should then be run, to verify that the second simultaneous authentication attempt fails.

After running the bob-acct-stop.sh script, you should run the bob-login-two.sh script again, to verify that the other login attempt is now permitted to succeed.