QUESTION: 85

A systems administrator made some unapproved changes prior to leaving the company. The newly hired administrator has been tasked with revealing the system to a compliant state. Which of the following commands will list and remove the correspondent packages?

dnf list and dnf remove last
dnf remove and dnf check
dnf info and dnf upgrade
dnf history and dnf history undo last

Answer(s): D

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QUESTION: 86

An administrator transferred a key for SSH authentication to a home directory on a remote server. The key file was moved to .ssh/authorized_keys location in order to establish SSH connection without a password. However, the SSH command still asked for the password. Given the following output:
Which of the following commands would resolve the issue?

restorecon .ssh/authorized_keys
ssh_keygen -t rsa -o .ssh/authorized_keys
chown root:root .ssh/authorized_keys
chmod 600 .ssh/authorized_keys

Answer(s): A

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QUESTION: 87

A cloud engineer needs to remove all dangling images and delete all the images that do not have an associated container. Which of the following commands will help to accomplish this task?