linuxexpert-practice-labs/labs/rhcsa/1-3-ssh-and-switching-users/README.md

RHCSA 1.3: SSH and switching users

Running one command on another machine over SSH, switching users with a full login environment, running a command as another user, and logging in on a text console.

Before you start

The peer, at 10.99.0.2 (name peer), stands in for the second VM. It runs its own sshd. It shares this VM's files and users, so it has the same host name, but not its network: logins to it come from 10.99.0.1. The lab creates user tester (password Lab-Pass-1) to log in there with. Write the results of tasks 1 and 3 to the files named there, so they can be checked.

Tasks

1. Run hostname on the peer over SSH as tester, without staying logged in, and save the name it prints to /root/lab-answers/1.
2. Create a user alice with a password, then switch to her with a full login environment from your normal user.
3. As root, run id as alice without switching to her and without a password, and save its output to /root/lab-answers/3.
4. Log in on the second text console of this VM (tty2) as alice, and stay logged in there while you check.

Hints

• ssh USER@HOST COMMAND; sudo tee or | sudo tee /root/lab-answers/1.
• useradd, passwd; su - alice, then pwd and whoami.
• sudo -u alice id, runuser -u alice -- id.
• The VM's console: Ctrl+Alt+F2 (in a VM window, send the key combination from its menu), or chvt 2. who lists the logins.