You are using a Linux system that is managed by systemd, which uses the systemctl command to manage services and daemons. Complete the following tasks on CorpServer: Delete the phoenix directory in the /projects directory. Restart the sshd.service. Rename the hrickman user account to agruber. Lock (disable) the treeves user account.

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Linux

An operating system (OS) is the software which manages hardware and resources, like CPU, storage and memory. The OS bridges the applications and hardware and makes the connections between all of your software and the hardware resources.