Hands-on lab for disabling the sudo timer

For this lab, you'll disable the sudo timer on your CentOS VM:

1. Log in to the same CentOS virtual machine that you used for the previous lab. We'll be using the user accounts that you've already created.
2. At your own user account command prompt, enter the following commands:

 sudo fdisk -l
 sudo systemctl status sshd
 sudo iptables -L

You'll see that you only needed to enter the password once to do all three commands.

3. At your own user account command prompt, run the following:

 sudo fdisk -l
 sudo -k
 sudo fdisk -l

Note how the sudo -k command resets your timer, so you'll have to enter your password again. Open visudo with the following command:

sudo visudo

In the Defaults specification section of the file, add the following line:

Defaults timestamp_timeout = 0 

Save the file and exit visudo.

4. Perform the commands that you performed in Step 2. This time, you should see that you have to enter a password every time.
5. Open visudo and modify the line that you added so that it looks like this:

Defaults:lionel timestamp_timeout = 0 

Save the file and exit visudo.

6. From your own account shell, repeat the commands that you performed in Step 2. Then, log in as Lionel and perform the commands again.
7. View your own sudo privileges by running the following:

sudo -l