CompTIA Linux+ (XK0-004) Labs – Practice Mode

Kernel modules are often used to add support for new hardware (as device drivers), for adding system calls, and filesystems. You’re being asked by your instructor to insert modules into the kernel. Type the command to insert the modules.

Just after you’ve successfully added some kernel modules on the Linux kernel, you realize you need to remove some. Type the command to remove the modules.

To know more about a Linux kernel module, there is a command that displays information about it. The command extracts the information from the Linux kernel modules given on the command line. Type the command to display the information about the kernel module.

A command which is also known as “display message” or “driver message” is used to inspect the kernel ring buffer and print the message buffer of the kernel. The output of the command can help you find out what the problem is if a system becomes faulty during start-up. Type the command that print the message buffer of the kernel.

For some reason, you want to unload a kernel module. Type the command to unload the kernel module.

What command would you use to generate a list of dependency descriptions of kernel modules and their associated map files. Type the command to analyze kernel modules.

You don’t know which user account you are using on the Linux system you’ve been working on. It’s time to find out. Type in the command that will tell you which user account it is.

You heard your name being called out by your company’s IT manager, and he said “I need you to display details of all kernel-resident network interfaces including disabled interfaces.” Type in the command to display details of all interfaces.

Hasan, your colleague at work asks you to help him search for /etc/passwd for dojolab user. Type in the command that searches the given file for lines containing a match to the given strings or words.

You are to manually assign “192.168.1.12” as the IP address for the Interface eth0. Type the command to assign the IP address.

Your boss instructs you to search for all the files having an extension tag.gz in the root directory and all the sub-directories including mounted devices. Type the command to find the files.

Frank wants to find out the absolute path of the current directory, but he forgot the command that can help him achieve that. As a good friend of Frank, type the command to help him find the absolute path of the current directory.

On a wired network, you’re tasked by your IT instructor to assign IP address 192.168.1.12, Netmask, and Broadcast to interface eth0. Type in the command to do that.

You want to check the manual page for a command, there’s a command that provides online documentation for all the possible options with a command and its uses. Type the command that shows the manual page of commands.

You want to know the status of all the running processes along with process PID and id, type the command to list the status of all the processes along with the process id and PID.

Your best friend, John, has started to learn Linux. He wants to complete a task and needs your help, which is to list all the files and directories inside a given directory. He hands over his computer to you. Type the command to list all files or directories from the CLI.

As the Linux system administrator of Dojolab, you need to find the name server information for dojolab.com by querying DNS. Type the command to get information from the DNS server of dojolab.org

Priscillia knows the netstat command, but she needs more information about the command, she wants to locate the binary, source, and manual page for the command. As her elder brother, a linux pro, help her type the command to locate where the netstat’s manual page is.

Shamsi is a beginner in Linux, so he doesn’t know how to simply create a directory on Linux. Show him how it’s done. Type the command to create a dojolab directory inside the home directory.

You want to simply query a single host; to query DNS nameservers for information about host addresses, nameservers, mail exchanges, and related information. Type the command to collect data about domain name servers.

You’ve just connected to your Linux server machine and found something malicious or unusual, you want to know how long the system has been running. Type the command to display the time since the last boot.

You use ls –l command frequently, which contains 5 characters including the space. To be efficient, you decide to replace the command with l, a shorter string while executing the command. Type the command to create an alias for ls –l to l.

Your list of alias commands is getting longer, so you decide to remove the alias “l”. Type the command to remove the alias “l”.

You don’t want to receive any terminal messages from any user. Type the command to prevent the display of terminal messages from other users.

Your boss asks you to remove some files: dojolab1, dojolab2, and dojolab3. You decide to remove the files in a recursive way. Type the command to remove the three (3) files.

This time it’s required of you to remove the three (3) files (dojolab1, dojolab2, and dojolab3) in a forceful manner, ignoring errors and prompts. Type the command to forcefully remove those three (3) files.

During your interview for Linux system administrator position, the interviewer gives you a system and ask to display all network ports associated with the system. Type the command to display all network ports.

In your small IT company where you’re hired as a Linux administrator, everybody logs in with their mesg permission set to yes. You want to send a message to all users, the message is Breaktime. Type the command to send the message (Breaktime) to all users.

Your instructor asks you to extract an archive file. Type the command used for creating archives and extracting files in Linux.

Shamsi has no idea about the available and used disk space usage of the file system on his Linux system. He would love to see the file system disk space statistics in human-readable format — bytes, megabytes, and gigabytes. As an instructor to Shamsi, help him type the command to show the file system disk space statistics in human-readable format.

Your manager sent you a document named dojolab1.txt. The instruction is to copy the file to dojolab2.txt. Type the command to copy the dojolab1.txt to dojolab2.txt

Your manager sends broadcast messages via his Linux system to everyone. You don’t receive the messages on your Linux system because you’ve not enabled your system to receive terminal messages. Type the command to allow terminal messages to display on your screen.

Nick wants to find out the disk usage summary of a /home/dojolab directory tree and each of its subdirectories. Type the command to find out the disk usage.

Jenifer comes to you with the Linux assignment given to her by her instructor. The instruction is to rename a file from helloboy.txt to himan.txt. As a Linux pro, type the command to help her rename the file from the command prompt.

You want to print the directory structure in a nice visual tree display design. Type the command to display the content of a directory in a tree-like format.

When you came back from the gym you felt someone had used your Linux system, you want to know who is logged on your Linux system and what they were doing, type the command to show information about currently logged in users (uptime) and what each user is doing (who).

You want to open a new account on one of your finance app. So you need a hard-to-guess, random password. Using your Linux terminal, type the command to help you generate a strong random password of 10 characters.

Your younger brother logs into your Linux system without your permission because he knows your password. So you decided to change it. Type the command used for changing the password.

Nick wants to print a file directly via his Linux system without using a windows application. He doesn’t even know the command for printing files on Linux. So he hands over his computer to you, knowing you’re a professional. Type the command for printing documents on Linux.

By displaying all the files that are currently opened on your system, you’ll be able to figure out which processes uses a certain file. Type the command to find out the files which are opened by which process.

You wrote a simple code using java programming language. You saved it as Dojolab.java on your Linux system. Type the command to compile the Dojolab.java program.

You got a message from your colleague at work. The message contains two (2) documents (dojolab1.txt and dojolab2.txt) along with a request that goes like this “hey mate, help me compare the two files byte by byte to find out whether or not the two files are identical”. You’re on your Linux, type the command to compare the two files.

You quickly need to edit a text file already existing on your Linux system. The text filename is dojolab1.txt. So, of course, you need a text editor to do that. Type the command that opens a vim text editor on Linux so you can edit the dojolab1.txt file.

You wrote a simple code using the C programming language. You saved it as Dojolab.c on your Linux system. Type the command to compile the Dojolab.c program.