XK0-005 System Management — All Questions With Answers

Question 1mediummultiple choice

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A Linux administrator needs to locate all files in the /var directory that have been modified within the last 30 minutes and are larger than 10MB. Which command accomplishes this task?

Question 2easymultiple choice

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A user reports that a script in /home/user/script.sh fails to execute. The output of 'ls -l script.sh' is '-rw-r--r-- 1 user user 1024 Apr 1 10:00 script.sh'. Which command should be used to make the script executable for all users?

Question 3hardmultiple choice

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A system administrator needs to set the umask so that newly created files have permissions of 644 and directories have permissions of 755. Which umask value should be set?

Question 4mediummultiple choice

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An administrator wants to grant a specific user, 'jdoe', read and write access to a file that is owned by root:root with permissions 640. The administrator does not want to change the file's owner or group. Which approach should be used?

Question 5easymultiple choice

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A user needs to view the first 15 lines of a large log file. Which command is most appropriate?

Question 6mediummultiple choice

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A Linux administrator wants to search for all occurrences of the word 'ERROR' in log files under /var/log, ignoring case, and also print the line numbers. Which command should be used?

Question 7mediummultiple choice

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An administrator needs to replace all occurrences of 'oldhost' with 'newhost' in the configuration file /etc/hosts. Which command will perform the replacement and save the changes directly to the file?

Question 8hardmultiple choice

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A process with PID 2345 is not responding. The administrator wants to force stop the process immediately. Which command should be used?

Question 9mediummultiple choice

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A service called 'myapp' fails to start automatically after a system reboot. The administrator wants to ensure the service starts at boot. Which systemctl command should be used?

Question 10easymultiple choice

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Which directory in the Linux filesystem contains essential user command binaries that are needed for booting and repairing the system?

Question 11mediummultiple choice

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An administrator needs to view the last 20 lines of the systemd journal for the 'sshd' service. Which command should be used?

Question 12hardmultiple choice

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A system administrator needs to install a package from a local RPM file without resolving dependencies automatically. Which command should be used?

Question 13mediummulti select

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A Linux administrator needs to display the amount of disk space used by each mounted filesystem. Which two commands can be used? (Choose two.)

Question 14hardmulti select

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An administrator wants to change the runlevel/target to a state where only a minimal set of processes is running, and network services are disabled. Which two systemd targets achieve this? (Choose two.)

Question 15mediummulti select

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A user wants to create a hard link to a file. Which three conditions must be true for a hard link to be created successfully? (Choose three.)

Question 16easymultiple choice

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A Linux administrator needs to view the last 10 lines of a log file named 'syslog'. Which command should be used?

Question 17mediummultiple choice

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A technician notices a script fails to execute because the user does not have permission. The script currently has permissions 644. The technician needs to add execute permission for the owner only. Which command accomplishes this?

Question 18mediummultiple choice

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An administrator wants to find all files in /var/log that have been modified within the last 2 days and have a .log extension. Which command should be used?

Question 19hardmultiple choice

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A system administrator wants to ensure a service starts automatically at boot and also starts immediately without rebooting. Which systemctl commands should be used?

Question 20easymultiple choice

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Which command displays the disk usage of files and directories in a human-readable format (e.g., KB, MB)?

Question 21mediummultiple choice

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A user reports that they cannot access a file because permission is denied. The file's permissions are -rwsr-xr-x. What special permission is set?

Question 22mediummultiple choice

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An administrator needs to replace all occurrences of 'oldhost' with 'newhost' in the file /etc/hosts. Which sed command should be used?

Question 23hardmultiple choice

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A Linux engineer is troubleshooting a boot issue. The system boots to a command-line interface but does not start the graphical interface. Which systemd target should be set as default to boot into a graphical environment?

Question 24easymultiple choice

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Which command is used to create a symbolic link named 'link' pointing to the file 'original'?

Question 25mediummultiple choice

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A technician needs to kill a process with PID 1234 that is not responding to normal termination. Which command sends SIGKILL?

Question 26hardmultiple choice

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An administrator wants to list all files in the current directory that are larger than 1 MB. Which find command is correct?

Question 27mediummultiple choice

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Which command displays the number of lines, words, and characters in a file?

Question 28mediummulti select

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A Linux administrator needs to add an ACL entry to grant read permission to a user named 'jdoe' on a file. Which TWO commands can be used to achieve this? (Select TWO).

Question 29hardmulti select

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A system administrator is investigating a performance issue. Which THREE commands can be used to monitor running processes in real-time? (Select THREE).

Question 30mediummulti select

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A Linux administrator wants to search for the pattern 'ERROR' in all files under /var/log, ignoring case, and display line numbers. Which THREE options should be used with the grep command? (Select THREE).

Question 31easymultiple choice

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Which command is used to display the current process hierarchy in a tree format?

Question 32mediummultiple choice

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A Linux administrator needs to find all files in /var/log that have been modified within the last 7 days and are larger than 10 MB. Which find command accomplishes this?

Question 33hardmultiple choice

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Given an ACL entry 'u:john:rwx' on a file, which command would remove only the ACL entry for user john without affecting other ACL entries?

Question 34mediummultiple choice

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A system administrator wants to change the priority of a running process with PID 1234 to a lower priority (higher nice value). Which command should be used?

Question 35easymultiple choice

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Which of the following directories is defined by the Filesystem Hierarchy Standard (FHS) as containing essential user command binaries that need to be available in single-user mode?

Question 36mediummultiple choice

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An administrator needs to find the line number of the first occurrence of the string 'ERROR' in a log file, ignoring case. Which command is most appropriate?

Question 37mediummultiple choice

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A technician is troubleshooting a service that fails to start at boot. Which systemctl command should be used to ensure the service starts automatically on subsequent boots?

Question 38hardmultiple choice

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A file has permissions rwxr-x--- and is owned by user alice and group devs. Which command would add the SUID bit while preserving existing permissions?

Question 39easymultiple choice

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Which command is used to display the contents of the systemd journal for a specific unit?

Question 40mediummultiple choice

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An administrator needs to replace all occurrences of '192.168.1.1' with '10.0.0.1' in a configuration file named config.txt. Which sed command should be used to perform an in-place edit?

Question 41hardmultiple choice

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A technician wants to create a symbolic link in /usr/local/bin that points to /opt/myapp/bin/start.sh. The technician has write permissions to /usr/local/bin. Which command should be used?

Question 42mediummultiple choice

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Which command would display the disk usage of each file and directory in /home in a human-readable format, but only showing one level deep?

Question 43mediummulti select

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A Linux administrator needs to locate all files in the /etc directory that have been modified in the last 24 hours and are not owned by root. Which two commands can be combined to achieve this? (Select TWO.)

Question 44hardmulti select

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An administrator suspects that a malicious process is running and wants to list all processes, including those without a controlling terminal, and see their full command line. Which two commands can provide this information? (Select TWO.)

Question 45easymulti select

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Which three directories are required by the FHS to be present on a Linux system? (Select THREE.)

Question 46mediummultiple choice

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A Linux administrator needs to locate all files in the /var/log directory that have been modified within the last 2 days and contain the word 'error' (case-insensitive). Which command accomplishes this?

Question 47hardmultiple choice

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A system administrator is troubleshooting a service that fails to start at boot. The system uses systemd. Which of the following commands would the administrator use to check the service's status and view its recent log entries?

Question 48easymultiple choice

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A user wants to change the permissions of a file to give the owner full control, the group read and execute, and others no access. Which of the following chmod commands will achieve this?

Question 49mediummultiple choice

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An administrator needs to add an ACL entry to a file that grants the user 'john' read and write permissions. The file currently has no ACLs. Which command should the administrator use?

Question 50easymultiple choice

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Which of the following directories in the Filesystem Hierarchy Standard (FHS) contains variable data files such as logs, spool files, and temporary files that persist across reboots?

Question 51mediummultiple choice

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A system administrator wants to view the last 10 lines of a log file and also save those lines to another file for analysis. Which command should the administrator use?

Question 52hardmultiple choice

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During the boot process, after the kernel is loaded and the initramfs is executed, which component is responsible for starting the user-space services and managing the system state?

Question 53mediummultiple choice

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A Linux administrator needs to remove a package installed via RPM and all its configuration files. Which command should the administrator use?

Question 54mediummultiple choice

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An administrator wants to find all files in the current directory tree that are larger than 100 MB and have the .log extension. Which find command will accomplish this?

Question 55easymultiple choice

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Which command displays the amount of disk space used and available on mounted filesystems in a human-readable format (e.g., GB, MB)?

Question 56hardmultiple choice

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A process is running with a nice value of 5. The system administrator wants to increase its priority (lower the nice value) to -5 but is not the owner of the process. What must the administrator do first to achieve this?

Question 57mediummultiple choice

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An administrator wants to replace all occurrences of 'oldstring' with 'newstring' in a configuration file named config.cfg, and save the changes. Which sed command should be used?

Question 58hardmulti select

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A Linux administrator needs to identify which of the following filesystems are journaling filesystems commonly used in Linux. (Choose three.)

Question 59mediummulti select

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A user has a file with permissions set to 644. Which of the following commands will add the setuid permission to the file? (Choose two.)

Question 60easymulti select

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Which of the following commands can be used to display the contents of a file one page at a time? (Choose two.)

Question 61easymultiple choice

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A Linux administrator needs to locate all files in /var/log that were modified more than 7 days ago. Which command should be used?

Question 62easymultiple choice

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A user wants to create a hard link named 'linkfile' to an existing file 'original'. Which command accomplishes this?

Question 63mediummultiple choice

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An administrator notices that a service named 'httpd' is not running. They want to check its current status and, if inactive, start it. Which set of systemctl commands should be used?

Question 64mediummultiple choice

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A file has permissions set to 2755. Which special permission is enabled, and what does it do?

Question 65easymultiple choice

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Which command displays the amount of free and used disk space on all mounted file systems in a human-readable format?

Question 66hardmultiple choice

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An administrator wants to change the default systemd target to multi-user.target so the system boots to a text console. Which command should be used?

Question 67mediummultiple choice

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A technician needs to search a log file for lines containing either 'ERROR' or 'FATAL' and display the line numbers. Which command accomplishes this?

Question 68hardmultiple choice

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A system administrator runs 'umask 027' in a Bash shell. What will be the default permissions for a new directory created in that shell? (Assume no other umask changes.)

Question 69mediummultiple choice

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After making changes to /etc/grub.d/ and /etc/default/grub, an administrator needs to regenerate the GRUB2 configuration file. Which command should be used?

Question 70mediummultiple choice

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A process is consuming excessive CPU and needs to be terminated immediately. The PID is 1234. Which command will terminate the process with the most forceful signal?

Question 71hardmultiple choice

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An administrator wants to display only the second field from a colon-delimited file named 'passwd' using a text processing tool. Which command will achieve this?

Question 72easymultiple choice

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Which directory in the Filesystem Hierarchy Standard (FHS) contains essential user commands available to all users, such as 'ls' and 'cp'?

Question 73mediummulti select

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A Linux administrator needs to view real-time information about running processes, including CPU and memory usage. Which TWO commands can be used for this purpose? (Choose two.)

Question 74hardmulti select

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A technician is troubleshooting a service that fails to start. The service file is located in /usr/lib/systemd/system. Which THREE commands can be used to investigate the service's status and logs? (Choose three.)

Question 75mediummulti select

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An administrator needs to grant read and write access to the 'developers' group on a directory while preserving existing permissions for the owner and others. Which TWO commands can be used to modify ACLs? (Choose two.)

Question 76easymultiple choice

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A Linux administrator needs to change the permissions of a file to be readable and writable by the owner, readable by the group, and no access for others. Which command accomplishes this?

Question 77mediummultiple choice

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A system administrator wants to find all files in /var/log that have been modified in the last 7 days and are larger than 100MB. Which command should be used?

Question 78hardmultiple choice

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A developer wants to grant a user named 'john' read and write permissions to a file, but the file currently has an ACL that gives 'jane' full control. The administrator wants to add an ACL entry for 'john' without modifying existing entries. Which command accomplishes this?

Question 79mediummultiple choice

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Which of the following commands will display the last 10 lines of a log file and also output new lines as they are appended?

Question 80mediummultiple choice

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A user wants to run a command that will continue running even after the user logs out. Which command should be used?

Question 81easymultiple choice

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Which directory in the FHS contains essential user command binaries that are needed in single-user mode?

Question 82mediummultiple choice

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An administrator needs to permanently mount an ext4 filesystem on /dev/sdb1 to the /data directory. Which file must be edited to ensure the mount persists across reboots?

Question 83hardmultiple choice

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A system running systemd is failing to boot properly. The administrator wants to boot into an environment with only the essential services for troubleshooting. Which systemd target should be selected at boot?

Question 84easymultiple choice

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Which command is used to query the status of a service managed by systemd?

Question 85mediummultiple choice

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An administrator wants to change the priority of a running process with PID 1234 to a lower priority (nicer). The current nice value is 0. Which command will set the nice value to 10?

Question 86hardmultiple choice

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A developer creates a hard link to a file and then deletes the original file. What happens to the hard link?

Question 87mediummultiple choice

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Which command will display the disk usage of each directory in the current directory, in human-readable format?

Question 88mediummulti select

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A system administrator needs to remove all files in /tmp that have not been accessed in the last 30 days and are not owned by root. Which two commands, combined, could be used to accomplish this? (Select TWO).

Question 89hardmulti select

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An administrator wants to view the contents of a compressed log file /var/log/syslog.2.gz without decompressing it to disk. Which two commands can be used to display the file contents? (Select TWO).

Question 90mediummulti select

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A security analyst wants to identify all lines in a log file that contain either 'ERROR' or 'WARNING' and also contain 'timeout'. Which three commands can be used to achieve this? (Select THREE).

Question 91easymultiple choice

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A Linux administrator needs to change the permissions of a file to allow the owner to read and write, the group to read only, and others to have no access. Which chmod command should be used?

Question 92easymultiple choice

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Which command is used to display the contents of a compressed log file without decompressing it?

Question 93easymultiple choice

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A technician wants to find all files owned by user 'jane' in the /home directory. Which command accomplishes this?

Question 94mediummultiple choice

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An administrator needs to find all files in /var/log that have been modified within the last 2 days. Which find command should be used?

Question 95mediummultiple choice

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A system administrator wants to ensure that a service starts automatically at boot time using systemd. Which command should be used?

Question 96mediummultiple choice

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A user reports that a specific process is consuming too much CPU. The administrator needs to change the priority of the process to a lower value (nicer). Which command sequence is appropriate?

Question 97mediummultiple choice

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An administrator wants to list all USB storage devices attached to the system. Which command provides this information?

Question 98mediummultiple choice

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A technician needs to replace the string 'oldhost' with 'newhost' in the file /etc/hostname. Which sed command will perform this change in-place?

Question 99mediummultiple choice

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An administrator wants to view the last 20 lines of a log file and continue to watch for new entries. Which command should be used?

Question 100mediummultiple choice

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A user wants to create a symbolic link to a file named 'original' in their home directory. Which command creates a symbolic link named 'link'?

Question 101hardmultiple choice

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An administrator needs to find all files in /etc that have the SUID bit set. Which find command is correct?

Question 102hardmultiple choice

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An administrator is troubleshooting a boot issue. The system boots to a console with limited functionality. Which systemd target should be used to bring up the system with network and multi-user support?

Question 103hardmultiple choice

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A Linux administrator wants to limit the disk space used by the /var/log directory. Which tool can be used to set disk usage quotas for a filesystem?

Question 104mediummulti select

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An administrator wants to monitor real-time system resource usage to identify performance bottlenecks. Which two commands are suitable? (Choose two.)

Question 105hardmulti select

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A system administrator is configuring a new disk partition for a database server. The disk has been partitioned as /dev/sdb1. Which three steps are necessary to make the filesystem available for use? (Choose three.)

Question 106easymultiple choice

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Which command would a Linux administrator use to locate all files in the /var/log directory that have been modified within the last 7 days?

Question 107easymultiple choice

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A Linux administrator wants to change the permissions of a file to allow the owner to read, write, and execute; the group to read and execute; and others to read only. Which chmod command should be used?

Question 108easymultiple choice

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Which command displays the current umask value in symbolic mode?

Question 109mediummultiple choice

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A system administrator needs to find all files in the /etc directory that are larger than 1 MB and are regular files. Which find command accomplishes this?

Question 110mediummultiple choice

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An administrator wants to display the last 20 lines of a log file and also write those lines to a file called recent.log. Which command should be used?

Question 111mediummultiple choice

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A developer wants to change all occurrences of 'foo' to 'bar' in a configuration file and save the changes in-place. Which sed command should be used?

Question 112mediummultiple choice

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A system administrator notices that a process with PID 1234 is consuming excessive CPU. The administrator wants to terminate this process gracefully. Which command should be used?

Question 113mediummultiple choice

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An administrator wants to start a long-running script in the background so that it continues running even after logging out. Which command should be used?

Question 114hardmultiple choice

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A Linux server is booting but stops at a prompt with the message 'Give root password for maintenance'. Which systemd target is the system likely trying to reach?

Question 115hardmultiple choice

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An administrator is troubleshooting a service that fails to start. The administrator wants to view the last 50 lines of the service's journal log entries from the current boot. Which journalctl command should be used?

Question 116hardmultiple choice

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An administrator needs to apply a set of permissions to an existing directory and all its contents, setting the owner to 'rwx', group to 'rx', and others to '---'. Additionally, newly created files within the directory should inherit the group. Which commands should the administrator run? (Assume the directory is /data, and the group is 'staff'.)

Question 117hardmultiple choice

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A technician needs to create a new ext4 filesystem on /dev/sdb1 and mount it persistently at /mnt/data. Which set of commands accomplishes this?

Question 118mediummulti select

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A system administrator wants to display a list of all currently running processes, including those of other users, with full command lines. Which TWO commands can achieve this? (Select TWO.)

Question 119mediummulti select

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An administrator needs to update the package cache and upgrade all installed packages on a Debian-based system. Which TWO commands are appropriate for this task? (Select TWO.)

Question 120hardmulti select

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A technician needs to remove all files in /tmp that are owned by the user 'jdoe' and have not been accessed in 10 days. Which THREE commands or options would be part of a correct solution? (Select THREE.)

Question 121easymultiple choice

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A Linux administrator needs to view the contents of a compressed log file without decompressing it. Which command should be used?

Question 122mediummultiple choice

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An administrator runs the command `ls -l file.txt` and sees the permissions `-rwsr-xr-x`. What special permission is set on this file?

Question 123hardmultiple choice

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A system administrator wants to find all files in /var/log that have been modified in the last 7 days and are larger than 10MB, then delete them interactively. Which command accomplishes this?

Question 124easymultiple choice

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Which directory in the Filesystem Hierarchy Standard (FHS) contains variable data such as logs and spool files?

Question 125mediummultiple choice

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An administrator needs to give a user read and write access to a file without changing the file's group or adding the user to any group. Which method should be used?

Question 126hardmultiple choice

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A technician needs to replace all occurrences of '192.168.1.' with '10.0.0.' in the file /etc/network/interfaces and save the changes. Which command accomplishes this?

Question 127mediummultiple choice

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A process is consuming excessive CPU and needs to be stopped immediately. The process ID is 4582. Which command should be used?

Question 128easymultiple choice

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Which command displays real-time information about running processes, including CPU and memory usage, and updates the display dynamically?

Question 129mediummultiple choice

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An administrator wants to ensure a service starts automatically at boot on a systemd-based system. Which command should be used?

Question 130mediummultiple choice

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A technician needs to check which package provides the file /usr/bin/foo on a CentOS 8 system. Which command should be used?

Question 131hardmultiple choice

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During boot, the system stops at a shell with limited functionality. The administrator suspects the root filesystem is corrupted. Which target should the system be booted into to perform recovery?

Question 132easymultiple choice

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Which command creates a symbolic link named 'link.txt' that points to 'original.txt'?

Question 133mediummulti select

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A system administrator needs to view the last 15 lines of a log file that is constantly being updated. Which TWO commands can be used to achieve this? (Choose two.)

Question 134hardmulti select

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A technician needs to find all files in /home that have the SUID or SGID permission set. Which THREE commands can accomplish this? (Choose three.)

Question 135mediummulti select

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An administrator wants to gather information about disk usage for a specific directory and its subdirectories. Which TWO commands can be used for this purpose? (Choose two.)

Question 136mediummultiple choice

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A Linux system has a directory with permissions drwxr-xr-x. A user in the group 'dev' tries to create a new file inside this directory. Which permission is missing that prevents the user from creating the file?

Question 137easymultiple choice

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An administrator wants to find all files larger than 100MB in the /var directory. Which command should be used?

Question 138hardmultiple choice

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A system administrator runs the command 'chmod 4755 /usr/local/bin/backup'. What effect does this have on the file?

Question 139mediummultiple choice

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A technician needs to replace the string 'old_config' with 'new_config' in the file /etc/app.conf and save the changes in place. Which sed command accomplishes this?

Question 140easymultiple choice

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Which command displays the current default umask value for a user?

Question 141mediummultiple choice

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A Linux system fails to boot, and the administrator wants to access a minimal environment to repair the system. Which systemd target should be specified in the kernel command line to achieve this?

Question 142hardmultiple choice

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An administrator runs 'rpm -V httpd' and sees output like 'S.5....T. /etc/httpd/conf/httpd.conf'. What does this indicate?

Question 143mediummulti select

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A system administrator needs to monitor real-time process information and system resource usage. Which two commands can be used for this purpose? (Choose two.)

Question 144hardmulti select

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An administrator wants to locate files that have the SUID or SGID special permission set. Which three find commands can accomplish this? (Choose three.)

Question 145mediummulti select

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A technician needs to apply an access control list (ACL) to a file to grant read and write permissions to a specific user. Which two commands are used to manage ACLs? (Choose two.)

Question 146easymulti select

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A user wants to view the contents of a text file one page at a time. Which two commands can be used? (Choose two.)

Question 147mediummulti select

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An administrator needs to permanently disable a systemd service from starting at boot. Which two commands can achieve this? (Choose two.)

Question 148hardmulti select

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A system administrator is investigating a performance issue and wants to view kernel-related messages. Which three commands can be used to access kernel ring buffer messages? (Choose three.)

Question 149easymulti select

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An administrator needs to create a hard link to an existing file. Which two statements are true about hard links? (Choose two.)

Question 150mediummulti select

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A technician wants to extract the third column of a tab-separated file and sort the output uniquely. Which three commands can be combined using pipes to achieve this? (Choose three.)

Question 151mediummulti select

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A Linux administrator is investigating a performance issue on a server. The administrator needs to identify which processes are consuming the most CPU and memory, and then adjust their priority. Which TWO commands should the administrator use to accomplish this? (Choose TWO.)

Question 152hardmulti select

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A system administrator needs to locate all regular files in /var/log that have been modified within the last 7 days and have a size greater than 10 MB. The administrator then needs to compress these files using gzip. Which THREE commands or options should be used together to accomplish this? (Choose THREE.)

Question 153mediummulti select

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A Linux administrator is configuring file permissions for a shared directory used by a development team. The administrator wants to ensure that any new files created in the directory inherit the group ownership of the directory and that the group has read and write permissions on those files. Which TWO actions should the administrator take? (Choose TWO.)