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| Vendor: | CompTIA |
|---|---|
| Exam Code: | XK0-005 |
| Exam Name: | CompTIA Linux+ Certification Exam |
| Exam Questions: | 487 |
| Last Updated: | March 4, 2026 |
| Related Certifications: | CompTIA Linux+ |
| Exam Tags: | Linux certifications Intermediate Level Junior Linux system administratorsLinux Cloud Engineers |
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A systems administrator wants to delete app . conf from a Git repository. Which of the following commands will delete the file?
To delete a file from a Git repository, the administrator can use the commandgit rm app.conf(D). This will remove the file ''app.conf'' from the working directory and stage it for deletion from the repository. The administrator can then commit the change withgit commit -m 'Delete app.conf'to finalize the deletion. The other commands will not delete the file, but either tag, commit, or checkout the file.:
[CompTIA Linux+ Study Guide], Chapter 10: Working with Git, Section: Deleting Files with Git
[How to Delete Files from Git]
A systems administrator created a user cron to run a scheduled database backup cronjob on the server at 1 a.m. every day. The following is the cronjob syntax:
0 1 * * * /bin/sh backup.sh
The backups, however, are not being created. When checking the crontab file, the administrator sees the following error:
/var/spool/cron/crontab/cron: Permission denied
Which of the following will permit the cronjob to execute?
The error indicates that the cron user does not have permission to run the cronjob. Creating a cron.allow file and adding the user cron to it will allow that user to run cronjobs. The cron.allow file is a security feature that controls which users are allowed to use cron.
An administrator accidentally deleted the /boot/vmlinuz file and must resolve the issue before the server is rebooted. Which of the following commands should the administrator use to identify the correct
The commandrpm -qa | grep kernellists all the installed kernel packages, and the commanduname -adisplays the current kernel version. These commands can help the administrator identify the correct version of the /boot/vmlinuz file, which is the kernel image file. The other options are not relevant or helpful for this task.:CompTIA Linux+ (XK0-005) Certification Study Guide, Chapter 8: Managing the Linux Boot Process, page 267.
A Linux systems administrator is troubleshooting an I/O latency on a single CPU server. The administrator runs a top command and receives the following output:
%Cpu(s): 0.2 us, 33.1 sy, 0.0 ni, 0.0 id, 52.4 wa, 0.0 hi, 0.2 si, 0.0 st
Which of the following is correct based on the output received from the exe-cuted command?
The server's CPU is spending too much time waiting for data inputs. This can be inferred from the output of the top command, which shows the percentage of CPU time spent in different states. The wa state stands for wait, and it indicates that the CPU is idle while waiting for an I/O operation to complete. In this case, the wa state is 52.4%, which means that more than half of the CPU time is wasted on waiting for data inputs. This can cause a high I/O latency and affect the performance of the server.
The other options are not correct based on the output received from the executed command. The server's CPU is not taking too long to process users' requests, because the us state, which stands for user, is only 0.2%, which means that the CPU is barely used by user processes. The server's CPU does not show a high idle-time value, because the id state, which stands for idle, is 0.0%, which means that the CPU is not idle at all. The server's CPU value for the time spent on system processes is not low, because the sy state, which stands for system, is 33.1%, which means that the CPU is heavily used by system processes.
:How to Use the Linux top Command (and Understand Its Output); [Understanding Linux CPU Load - when should you be worried?]
A Linux administrator needs to set the permissions on a server. The administrator wants to have the files within the directory set to read-write permissions and the directory set to read-write-execute permissions. Which of the following commands should the administrator use?
Comprehensive and Detailed Step-by-Step
setfacl (Set File Access Control Lists) is used to define more granular permissions for files and directories.
chmod 0022 sets specific permissions on files but does not affect newly created files.
chown 0027 is incorrect because chown is used to change file ownership, not permissions.
umask 0077 restricts permissions too much, making files private rather than just read/write.
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