Red Hat Certified System Administrator RHCSA Simulator #2

You are tasked with securely connecting to a remote server with the IP address 192.168.1.10 using the username admin. Which of the following commands would you use to initiate this connection using SSH?

You need to connect to a remote system using SSH on port 2222, rather than the default port 22. You are connecting to the server with IP address 10.0.0.5 using the username john. Which command accomplishes this?

You are currently logged in as the user alice. You need to switch to the user bob for performing some administrative tasks. Which command should you use to switch to the user bob?

After assisting with some configurations on a coworker’s system, you wish to return to your original login shell without terminating the current session. Which command would allow you to achieve this?

You have a directory named project_files that contains numerous files and subdirectories. You need to archive the entire directory and then compress it using gzip. Which of the following commands would allow you to accomplish this task?

You’ve received a compressed file named data.tar.bz2 from a colleague. You need to uncompress and unpack the file to access its contents. Which command should you use?

You are creating a script that should notify the administrator if the disk usage of the root partition exceeds 80%. Which code snippet correctly captures and processes the disk usage of the root partition?

You have a script that needs to count the number of active SSH sessions and store that number in a variable. Which code snippet correctly captures this data?

You need to create a script that checks if a specific user, “jdoe”, exists on the system. Which code snippet correctly verifies the existence of this user?

You’re writing a script to check the free space on the root filesystem and issue a warning if it’s below 10GB. Which code snippet achieves this?

You have been tasked to write a shell script that takes a list of filenames as arguments and renames each of them by adding a .backup extension. Which code snippet correctly achieves this?

You want to write a script that reads each line from a file named data.txt and processes each line to print out only those lines that contain the word “error”. Which code snippet correctly achieves this?

You are a system administrator and receive complaints about a server’s slow performance. You decide to investigate CPU-intensive processes. Which command would you use to display a real-time view of the system’s current processes sorted by CPU usage?

A certain process on your system is consuming a high amount of system resources and is unresponsive. You have the Process ID (PID) 1234 for this process. Which command would you use to forcefully terminate this process?

You are working on a Red Hat system, and a critical application with Process ID (PID) 5678 requires more CPU time than it currently receives. Which command would you use to give this process a higher priority by decreasing its nice value by 5?

One of the applications running on your system is too aggressive in consuming resources. You need to decrease its priority. Which statement about the ‘nice’ value in Red Hat systems is true?

Your Red Hat system is currently running with the virtual-host tuning profile. You’ve been asked to switch to a profile that would better suit a high throughput database server. Which of the following tuning profiles would be most appropriate?

You’re investigating the current tuning profile used by a Red Hat system. Which command will display the active tuning profile?

Sarah, a system administrator, needs to set up a new logical volume named “lv_reports” of size 10GB inside the “vg_data” volume group. Which command will achieve this?

After a project completion, Mike wants to delete a logical volume named “lv_temp” from the “vg_projects” volume group. What is the correct command to achieve this?

Alex wants to ensure that the /dev/sda1 partition mounts at boot using its UUID. He knows the UUID of the partition is 4a98adbc-f23d-48e1-a5f6-598ca2d310c0. Which line should Alex add to the /etc/fstab file to achieve this?

Lucy has a partition with a label “Backup” that she wants to auto-mount on boot at /mnt/backup. How should she correctly configure this in /etc/fstab?

Martin, a system administrator, needs to add a new logical volume named “logs” of size 10GB to the volume group “vg_data” without causing any disruptions to the running system. Which command should he use?

Jenna wants to add a new swap space of 4GB on her server without causing any disruptions. She has created a logical volume named “lv_swap” for this purpose. Which sequence of commands should she execute to achieve this?

Your organization’s database server is running out of storage on its /dbdata mount, which resides on a logical volume named lv_dbdata in the vg_databases volume group. There is an additional 20GB of unused space in vg_databases. You have been tasked with expanding lv_dbdata to utilize this space. Which command would accomplish this?

You’ve extended the logical volume lv_web in the volume group vg_website to accommodate more web content. After using lvextend, you need to ensure that the filesystem residing on the logical volume is aware of the added space. Which command should you use if the filesystem is ext4?

In an attempt to encourage collaboration between the design and marketing teams, an IT administrator created a shared directory, /shared/design_marketing. However, files created by the design team members cannot be edited by the marketing team members and vice versa. What should the administrator do to ensure that files and directories created inside /shared/design_marketing are editable by both teams?

A user, Tom, is unable to run a script named “runme.sh” located in his home directory. Tom sees the following output when checking the file’s permissions: -rw-r–r–. What command should Tom execute to resolve this issue and run the script without errors?

An application stores its configuration files in the directory /app/config. Users have reported that they cannot access the configuration files. Upon investigation, the directory permissions are shown as drwx——. What command should be executed to ensure that all users can read the files in the directory without giving them write or execute permissions?

You have a new USB drive that you need to format with the vfat file system, mount it to /mnt/usbdrive, and ensure all users can read and write to it. Which set of commands will achieve this?

You are tasked with installing the httpd package on a Red Hat system using the Red Hat Network. Which command will accomplish this?

After installing several packages, you want to ensure your system has the latest updates from the Red Hat Network. What command should you run?

A system administrator needs to set the default boot entry to the third kernel in the GRUB 2 bootloader on a Red Hat system. Which file should the administrator modify?

After a kernel upgrade, you want to keep the option to boot into the previous kernel version using the GRUB 2 bootloader. Which action ensures the older kernel entries are retained in the GRUB 2 boot menu?

A system administrator wants to run a script called backup.sh from the /root/scripts directory every day at 3 AM. Which of the following cron job entries in the crontab will achieve this?

A junior system administrator wants to run a one-time job at 5 PM today. He’s considering using the at command. Which of the following at commands will correctly schedule the job?

Lisa, a systems administrator, wants to temporarily allow HTTP traffic on her RHEL 8 server. Which command should she execute to achieve this without permanently modifying the firewall rules?

Michael wants to block a specific IP address, 192.168.1.10, from accessing his RHEL 8 server. Which command should he use to achieve this?

John, a system administrator, wants to configure a static IP address of 192.168.0.10 and a netmask of 255.255.255.0 for the enp0s3 network interface on a RHEL 8 server. Which command should he use?

Sarah is tasked with setting an IPv6 address of 2001:db8::2 on the network interface enp0s8. Which command accomplishes this without making the change permanent?

Anna wants to permanently set the hostname of her RHEL 8 server to server01.example.com. Which of the following commands should she use?

After setting up a local development environment, Mike needs to ensure that the hostname dev.local resolves to the IP address 192.168.0.100. Which file should he modify to achieve this on a RHEL system?

To ensure better security practices, a system administrator is instructed to lock the user account “jane” temporarily. Which command would correctly lock “jane’s” account?

A system administrator wants to set a password for user “alex” to expire in 30 days. Which of the following commands would achieve this?

For auditing purposes, the system administrator needs to determine the last time the password for the user “mike” was changed. Which command would provide this information?

As a system administrator, you have been tasked with creating a new group named “devteam” and then adding the user “john” to this group without removing him from any other group. Which set of commands would successfully achieve this task?

An intern mistakenly removed user “alice” from the “finance” group. As the system administrator, you need to re-add Alice to the finance group without changing her primary group or removing her from other groups. Which command will you use?

A new junior system administrator, Lisa, has joined your team. You want to give her superuser access, but only for running system monitoring tools and not for making system changes. Which of the following configurations in the sudoers file would allow this?

Lucia is troubleshooting an application on her Red Hat system. She believes that SELinux might be blocking the application from functioning correctly. Without disabling SELinux permanently, which command can Lucia use to temporarily set SELinux to permissive mode?

After testing a new configuration, Mia wants to set SELinux back to its enforcing mode, ensuring policies are actively enforced. Which command should she execute?

Jackson is working on a web server running Red Hat Enterprise Linux. He wants to verify the SELinux context of a file located at /var/www/html/index.html. Which command will provide him with the required information?

Simone is tasked with determining the SELinux context for a running process with PID 1234. Which of the following commands would help her in identifying the correct context?

While working on a Red Hat Enterprise Linux server, Martin notices that a custom script at /opt/custom_script.sh does not have the default SELinux context. He wants to restore its context to the default. Which command should he use?

Elaine is a system administrator who wants to restore the default SELinux context for all files within the /var/www/html directory. Which command will accomplish this while also covering all subdirectories?

Rachel, a systems administrator, has been tasked with obtaining a container image for an Nginx web server from Docker Hub. Which command should she use to retrieve the official Nginx image?

Daniel wants to verify if a specific version (1.19) of the Nginx image is available on Docker Hub without downloading it. Which command will help him achieve this?

Anna has a container image named “myapp:2.0” on her local system. She wants to inspect the metadata of this image to gather information about the environment variables set in the image. Which command should Anna use?

Lucas wants to find out the command that will run by default when the container “webserver:latest” starts. To inspect this specific detail, which command should Lucas utilize?

Elena is running a Red Hat system and wants to start a new container using an image from Docker Hub without having Docker installed. Which of the following commands will help her run a container with the image “nginx:latest”?

Marco needs to inspect the details of an image named “rhel7:latest” from a remote registry without pulling the image. Which command should he use to achieve this?