Log in to a Linux system on a local text console and run simple commands using the shell.

Configure key-based authentication for a user account to log in to remote systems securely without a password.

Describe key resources available through the Red Hat Customer Portal, and find information from Red Hat documentation and the Knowledgebase.

Analyze servers for issues, remediate or resolve them, and confirm the solution with Red Hat Insights.

Describe how Linux organizes files, and the purposes of various directories in the file-system hierarchy.

Create, copy, move, and remove files and directories.

Make multiple file names reference the same file using hard links and symbolic (or "soft") links.

Describe the purpose of users and groups on a Linux system.

Switch to the superuser account to manage a Linux system, and grant other users superuser access using the sudo command.

Create, modify, and delete locally defined user accounts.

Create, modify, and delete locally defined group accounts.

Set a password management policy for users, and manually lock and unlock user accounts.

Change the permissions and ownership of files using command-line tools.

Control the default permissions of new files created by users, explain the effect of special permissions, and use special permissions and default permissions to set the group owner of files created in a particular directory.

Describe how SELinux works and how to switch a server between its various enforcment modes.

Adjust the SELinux type of a file in order to control which processes can access it.

Change the accesses allowed by the SELinux policy by setting tunable parameters called SELinux booleans.

Perform basic investigation and troubleshooting of accesses blocked by SELinux.

Control and terminate processes that are not associated with your shell, and forcibly end user sessions and processes.

Describe what load average is and determine processes responsible for high resource use on a server.

Optimize system performance by selecting a tuning profile managed by the tuned daemon.

Prioritize or de-prioritize specific processes, with the nice and renice commands.

Register a system to your Red Hat account and assign it entitlements for software updates and support services using Red Hat Subscription Management.

Find, install, and update software packages using the yum command.

Enable and disable use of Red Hat or third-party Yum repositories by a server.

Explain how modules allow installation of specific versions of software, list, enable, and switch module streams, and install and update packages from a module.

Access file systems by attaching them to a directory in the file system hierarchy.

Create storage partitions, format them with the file systems, and mount them for use.

Create and manage swap spaces to supplement physical memory.

List system daemons and network services started by the systemd service and socket units.

Control system daemons and network services, using systemctl.

Describe the Red Hat Enterprise Linux boot process, set the default target used when booting, and boot a system to a non-default target.

Log into a system and change the root password when the current root password has been lost.

Manually repair file system configuration or corruption issues that stop the boot process.

Test and inspect current network configuration with command-line utilities.

Manage network settings and devices using nmcli.

Modify network settings by editing the configuration files.

Configure a server's static host name and its name resolution, and test the results.

Describe the basic logging architecture used by Red Hat Enterprise Linux to record events.

Interpret events in relevant syslog files to troubleshoot problems or review system status.

Find and interpret entries in the system journal to troubleshoot problems or review system status.

Configure the system journal to preserve the record of events when a server is rebooted.

Maintain accurate time synchronization using NTP and configure the time zone to ensure correct time stamps for events recorded by the system journal and logs.

Create and manage logical volumes from storage devices, and format them with file systems or prepare them with swap spaces.

Add and remove storage assigned to volume groups, and non-destructively extend the size of a logical volume formatted with an XFS or ext4 file system.

Manage multiple storage layers at once using Stratis local storage management.

Optimize use of storage space by using VDO to compress and deduplicate data on storage devices.

Schedule commands to run on a repeating schedule using the system crontab file and directories..

Enable and disable systemd timers, and configure a timer that manages temporary files

Mount, use, and unmount an NFS export from the command line and at boot.

Configure the automounter to automatically mount an NFS file system on demand, and unmount it when it is no longer in use.

Accept or reject network connections to system services using firewalld rules.

Explain what a container is and how to use one to manage and deploy applications with supporting software libraries and dependencies.

Install container management tools and run a simple rootless container.

Find, retrieve, inspect, and manage container images obtained from a remote container registry and stored on your server.

Run containers with advanced options, list the containers running on the system, and start, stop, and kill containers.

Provide persistent storage for container data by mounting a directory from the container host inside a running container.

Start, stop, and check the status of a container as a systemd service.