Red Hat Certified System Administrator RHCSA Simulator #3

You have been given a task to create a new file named report.txt in the /home/user directory and then add content to it. Which of the following commands will allow you to create and then edit the file using the default text editor?

You are troubleshooting a system issue and need to quickly append a line of text, “Error observed at 3 PM,” to a log file named system.log located in the /var/logs directory. Which of the following commands will accomplish this task?

You are working on a Linux system and need to create a new directory named project_data within the /home/user directory and then move a file named data.txt from /tmp to this newly created directory. Which of the following sequences of commands will accomplish this task?

You have a directory named old_reports which contains several report files. You need to make a copy of this entire directory and name the copy backup_reports, both directories being in the same parent directory. Which of the following commands will allow you to accomplish this?

You have a critical configuration file named config.conf in the /etc/app directory. You need to create a hard link named config.hlink within the same directory. Which command will accomplish this?

You are asked to create a symbolic link named latest.log in the /logs directory that points to a file named log_20231025.txt within the same directory. Which of the following commands will help you achieve this?

You are writing a script that requires two input arguments: a source file and a destination directory. You want to ensure that if the user doesn’t provide both arguments, the script prints a helpful message. Which of the following code snippets accomplishes this?

In a script, you want to print out the first argument given to it. However, if no argument is provided, you want it to print “No argument given.” Which of the following code snippets accomplishes this?

You are tasked with creating a script that checks for the amount of free memory on your system and sends a warning message if the free memory is less than 500MB. Which of the following code snippets would accomplish this?

You want to create a script that counts the number of active SSH connections to your server. Which of the following code snippets will accomplish this?

You have a script that requires the user to provide a username as an argument. You need to verify that the provided argument is not empty. Which of the following code snippets correctly checks if the argument is empty?

You want to write a script that checks if a directory exists. If it doesn’t, the script should create it. Which of the following code snippets accomplishes this task for a directory named “backup”?

You suspect there might have been an authentication issue on a Red Hat system. To verify this suspicion, you decide to inspect the relevant system log. Which of the following log files would you specifically check to find authentication-related messages?

You’re troubleshooting a service failure on a Red Hat system. To get a more detailed timestamped account of system events, you decide to utilize the systemd journal. Which of the following commands will display the journal logs?

After a recent audit, the security team has recommended preserving systemd journal logs on your Red Hat system for longer durations for compliance reasons. Which of the following steps should you take to ensure systemd journal logs are stored persistently beyond the default behavior?

You are tasked with limiting the amount of disk space that systemd journal logs can use on your Red Hat system. Which file would you edit to impose this restriction?

You have been informed that the SSH service on a Red Hat system is not responding to incoming requests. You want to check its status. Which of the following commands would you use to achieve this?

Your manager has asked you to temporarily disable the HTTP service on a Red Hat system to perform some maintenance tasks. After the tasks are completed, you’ll be asked to re-enable the service. Which command should you use to stop the HTTP service but ensure it starts again after a reboot?

Alice needs to create a new partition on a GPT disk named /dev/sdb. Which utility should she use, considering she prefers a command-line interface?

John has been asked to list all the partitions along with their filesystem types on a disk named /dev/sdc. Which command should he use to accomplish this task?

Emma is setting up a new Linux system and needs to create a physical volume on the /dev/sdb1 partition for use in a logical volume. Which command should she use?

After repurposing a disk, Lucas wants to remove the physical volume that was previously set up on /dev/sdc1. What command should he use to accomplish this

Julia is planning to expand the storage capacity of a volume group named “DataVG”. She has initialized a new physical volume on /dev/sdd1. Which command should she use to add this physical volume to the “DataVG” volume group?

Leo has a physical volume on /dev/sde1 that he mistakenly added to the volume group “BackupVG”. He intended to add it to “MainVG”. Which sequence of commands should he use to reassign the physical volume from “BackupVG” to “MainVG”?

You have an existing ext4 file system mounted at /data. You need to unmount this file system, convert it to xfs, and then remount it. Which set of commands should you use?

You have been instructed to mount an NFS share from a server named nfs-server.example.com with the export path /exports/data to your local directory /mnt/data. Which command will correctly mount the NFS share?

You have an NFS share mounted at /mnt/data from nfs-server.example.com. You are required to unmount this NFS share. Which command will successfully unmount it?

You have been given a task to automatically mount the NFS share nfs-server.example.com:/exports/docs to the directory /auto/docs when accessed, and unmount it after it’s no longer in use. Which of the following configurations in the /etc/auto.master file would facilitate this requirement?

You have a system where home directories are meant to be automatically mounted from an NFS server when a user logs in. The NFS server is nfs-server.example.com, and the exported home directories are located at /exports/home/. Which entry in /etc/auto.master will direct autofs to manage the automatic mounting of home directories?

You are tasked with extending the logical volume named lv_data in the volume group vg_projects by 5GB. Which command would you use to achieve this?

You are setting up a new Red Hat server and need to ensure that the httpd service starts automatically upon system boot. Which of the following systemctl commands should you use to achieve this?

A system administrator notices that a particular service, myservice, is not running after a system reboot. To troubleshoot, the administrator wants to check the current status and see any logs related to the service’s most recent start attempt. Which of the following commands should be executed?

A Linux server at your organization has been configured to boot into a graphical target by default. However, due to a change in requirements, you now need to configure it to boot into multi-user mode by default, which doesn’t provide any graphical interface. Which command accomplishes this?

You are configuring a Red Hat server which should boot into emergency mode by default for maintenance purposes. Which command ensures the server boots into this mode automatically during the next system startup?

You are tasked with configuring a Red Hat Enterprise Linux system to synchronize its clock with a specific NTP server: ntp.example.com. Which of the following commands should you use to add this server for synchronization?

You have a system that needs to synchronize its time with an internal NTP server, and you have decided to use chronyd for this task. You’ve already installed the chrony package. What is the next step you need to perform?

Jacob is managing a RHEL 8 server which runs a critical web application. To ensure the web server service starts automatically after a system reboot, which of the following commands should Jacob use?

Linda is troubleshooting a RHEL 8 machine which has a network service that isn’t starting automatically upon boot. She suspects the service isn’t enabled. To check the enabled status of a service called networkManager, which command should she use?

Alex is working as a system administrator for a company. He wants to temporarily allow incoming SSH traffic to the server. Which firewall-cmd command should Alex use to achieve this?

Elena is receiving reports that her company’s web server isn’t accessible externally. She suspects a firewall issue. Which firewall-cmd command should Elena use to check if HTTP service is allowed in the default zone?

Daniel wants to configure a static IP address of 192.168.1.10 with a netmask of 255.255.255.0 on the interface eth0. Which command should he use to achieve this?

Rebecca wants to configure an IPv6 address of 2001:db8::2 on the interface eth1. After adding the address, she wants to verify it. Which command should she use to check the IPv6 address configuration on eth1?

As a system administrator, you need to allow a user named “mark” to restart the httpd service without entering a password, but he should not have permissions to stop or start the service. Which configuration should you add to the sudoers file?

A new project in your organization requires a temporary user account for an external consultant named “Alan”. The account should exist for only 30 days. Which command would correctly create this user account with the specified condition?

To onboard a new developer in your team named “Sophie”, you are asked to create a new user account for her with the default shell set to /bin/tcsh. How can you accomplish this?

You’ve received a request to ensure that the user account “jdoe” has a password that expires every 60 days. Which command will set this requirement for user “jdoe”?

An audit recommendation has indicated that all user passwords should be changed at least every 45 days. You decide to modify the default settings to ensure compliance. Which command will enforce this policy?

You are setting up a new project environment and want to create a new group named “projectX” to which you can add users who are members of this project. Which command will achieve this?

John is a system administrator responsible for managing a Red Hat Enterprise Linux server. He needs to add a custom port label, mycustomport, to SELinux to allow network services to bind to it. Which command should he use to add the custom port label?

Sarah, a system administrator, needs to remove a custom port label, mycustomport, from SELinux because it’s no longer needed. Which command should she use to remove the custom port label?

Alice is a system administrator managing a Red Hat Enterprise Linux server. She needs to allow Apache HTTP to connect to network services and perform network-related operations. Which boolean value should she set to enable this access?

John needs to allow the FTP server to connect to the network and perform network-related operations. Which boolean value should he set to enable this access?

Sarah is a system administrator working with a Red Hat Enterprise Linux server. After configuring a new service, she encounters an SELinux policy violation. What command can she use to diagnose the SELinux violations and generate relevant audit logs for analysis?

David is a system administrator responsible for maintaining a Red Hat Enterprise Linux server. He encounters an SELinux policy violation related to a custom application. After using the audit2why command to diagnose the violation, it suggests that he should change the SELinux boolean to allow the action. Which command can he use to change an SELinux boolean?

Sophia has a web application running inside a container. She wants to ensure that user uploads within the container are stored on the host filesystem for persistence. Which of the following podman commands will correctly attach a directory from the host to the container at /app/uploads?

Eli is running a PostgreSQL container and wants to ensure that the database data remains persistent even if the container is removed. He decided to mount a directory from the host to /var/lib/postgresql/data inside the container. Which consideration regarding SELinux context should Eli remember when mounting this directory?

Liam wants to search for a MySQL container image in a remote registry without actually downloading it. Which of the following podman commands can he use to achieve this?

Ella is planning to retrieve a specific version of the Nginx container image from a remote registry. She knows the version is 1.18. Which of the following commands should she use to correctly pull this version?

Oliver recently downloaded a Redis container image and wants to inspect the detailed configuration of this image. Which command should Oliver use to retrieve detailed information about the Redis container image?

Sophia wants to find out the creation date of the latest alpine container image she has on her system. Which command will provide her with this specific information?