Using the –origin or -o option enables the name to be changed instead of the default of origin. The other choices are not options with git clone.

The -n option causes route to use numeric values only, performing no name resolution. This option is useful for the scenario described. The -e option causes the output to be in netstat format. There is no -d or -f option for the route command.

The /etc/inittab file contains a line similar to ca:12345:ctrlaltdel:/sbin/ shutdown -t1 -a -r now. Commenting out this line with a pound sign (#) will disable this key combination after restarting the system.

The /etc/cron.allow file is a list of users who have permission to create and remove their own cron jobs. The /etc/crontab file is used to store cron jobs. The other files do not exist.

The dracut command is used to create the initial RAM disk for newer systems and has replaced the legacy mkinitrd command used for the same purpose.

The steal column shows the percentage of time that was spent waiting due to the hypervisor stealing cycles for another virtual processor and can be used with infrastructure automation to indicate that additional CPU resources need to be deployed.

Because you’re working with MAC addresses, the arp command will be used. The -d option removes or deletes an ARP entry, which would be appropriate here so that the MAC address resolution occurs again. The netstat command will not be used for this purpose. The hostname and dig commands work with name resolution but not for MAC addresses or the ARP table.

The directory /usr/lib/firewalld/zones/ contains predefined zones for use with firewalld. The files are copied to /etc/firewalld/zones/ when modified.

The at command is used to run a series of commands that you enter. Unlike cron, you can schedule commands from the command line to be executed in the same order entered rather than having to create a specific script for the commands. The syntax shown in option B sets the time to be one hour from now.

Variables and values placed in /etc/sysctl.conf will take effect on boot. The other files listed are not valid.

The LC_ALL variable can be used to set environment variables for the locale and will override others. This can be used when there is a need for a temporary change. The other variables listed here are not used for this purpose and are not created by default.

The -o option removes newlines from the output, thereby making the output more suitable for the grep command. The -l option specifies the number of loops for the ip addr flush command. The -f option specifies the protocol family. There is no -n option.

The password configuration option is set in /boot/grub/grub.conf. The other options shown for this question are not valid for the scenario.

The userdel command is used for this purpose, and the -r option (lowercase) deletes both the home directory and mail spool files. The -R (uppercase) option informs the userdel command to use a chroot directory.

The –show-depends option displays the dependencies for a given module. The other options are not valid for the modprobe command.

A procedure is one or more commands that are executed on a client node as part of infrastructure automation.

The -s option creates an ARP table entry. The -d option removes an entry. The -c and –add options do not exist.

The setenforce command is used for this purpose and can be given an argument of the number 1 or the word Enforcing to enable Enforcing mode. This can be verified with the sestatus command.

The groupmod command is used for this purpose, and the -n option is used to change the group name. The other commands listed do not exist.

The format for the mount command is [partition] [target], thereby making option C correct. The other options are not valid because the arguments are in the wrong order

Double semicolons are used to indicate the end of an individual clause within a Bash script. The other sequences shown do not accomplish the task described.

The -D option lists the interfaces on a given computer. The -d option dumps compiled matching code, and -i selects an interface. There is no -a option.

The ssh-add command is used for this purpose. The other commands shown do not exist.

The /var/spool/cron/crontabs directory contains a file for each user that currently has one or more cron jobs or entries. Note that the other files listed here are not valid for this purpose.

The -n option changes the boot order for the next boot only and boots from the specified partition. The -b along with -B modifies and then deletes the option. The -o option sets the boot order. The -c option creates a boot number.

The unalias command is used to remove a previously defined alias. The rm command will remove regular files but not aliases. The other commands do not exist.

The printf command can be used to add special formatting to strings for printing. The echo command can be used somewhat for this purpose but is not as powerful at special-formatting capabilities as the printf command is. The other commands are not valid for this purpose.

The -R option requires an attempt at name resolution be performed. The -n option does the opposite: it disables name resolution. There is no -b or -a option.

The getfacl command is used to display access control list information for a file. The setfacl command is used to set this information. The other commands shown are not valid Linux commands.

The atrm command removes jobs given their ID. The ID can be obtained with the atq command. The atq and at -l commands shown will list jobs but not delete them. The rmat command is not valid.

The unlink command can be used to remove files and is sometimes faster than rm for simple uses. The other options are not valid.

ISOLINUX provides a means by which CD-ROMs formatted as ISO 9660 can be booted. It’s very common to have live CDs or rescue/recovery CDs that use ISOLINUX for boot. The other bootloaders are not valid for this purpose or don’t exist.

The -e option checks to ensure that a file exists and is typically used in the context of a conditional within a shell script. The other options may work within shell scripts but are not tests for file existence.

The mtr command provides a unique way to view real-time information about each hop in a route between hosts. Both the traceroute and route commands are valid, but the options shown for each are not. There is no liveroute command.

The scp command copies or transfers a file over SSH. The ncftp command cannot be used for this purpose. The other commands are not valid.

By overwriting /etc/securetty with an empty echo command, root will not be able to log in at the console directly. Of the other potential answers, option C removes /etc/securetty, the effect of which is to allow root to log in from anywhere.

The /etc/crontab file is a plain-text file that is treated as a system-wide cron file. As such, the file is generally not associated with any single user, and it’s not necessary to run a special command after editing this file.

Due to the decidedly insecure decisions made with the design of Microsoft’s UEFI, a shim is often needed to enable Linux to boot on a system with UEFI. The file shim.efi can be used as an initial bootloader for this purpose.

A “405, Method not allowed” response will be sent when TraceEnable is off. A 100 code is continue, while 302 is redirect and 200 is OK.

Setting LANG=C is an alias for POSIX compatibility and will cause programs to bypass locale translations. The other options shown for LANG are not valid.

The –delay option sets the interval between checks of array health. The argument value is in seconds. The other options shown are not valid.

The file ~/.ssh/config is the appropriate location for this type of configuration information. Of the other answers, only ~/.ssh/known_hosts exists and contains public key information for hosts to which you have connected.

The /etc/cron.daily directory contains files such as scripts that are executed daily. There are corresponding cron.hourly, cron.weekly, and cron.monthly directories that run on their respective schedules as indicated by the name of the directory.

The bcfg command within the UEFI shell is used to configure bootloaders on a UEFI-based system. The command can accept various parameters to configure how the bootloader and kernel will load on boot. Of the other commands shown, grub-install is valid but not within the UEFI shell.

The –list option shows the current configuration parameters for git. The other options do not exist as options for the git config command.

The !H sequence indicates host unreachable. Network unreachable is !N.

The -R option is used to indicate recursive behavior. Of the other options, only -v is valid and provides verbose output.

The nohup command causes the SIGHUP signal to be ignored, thereby enacting the scenario required for this question. The other commands are not valid.

The -m option causes the user’s home directory to be created. By default, if this option isn’t specified and CREATE_HOME has not been set, the home directory won’t be created. The -h option displays help text, and the other options shown are not valid.

The Master Boot Record, or MBR, is the first sector on a disk and contains information about the structure of the disk. If the MBR becomes corrupt, all data on the disk may be lost. The other options shown for this question are not valid.

The number 2 indicates STDERR redirection, and double greater-than signs indicate that the output will be appended rather than overwriting.

The -m option specifies how the packet should be marked or tagged. The -a option is an audible ping, and -p enables specification of custom padding. There is no -k option.

The lsusb command shows USB devices. When combined with grep -i (case insensitive), you can search for Bluetooth devices. The other options shown are not valid.

The gdisk command can be used to view GUIDs for a given partition. The other commands shown are not valid.

The usermod -L command locks an account by placing an ! in the encrypted password. If the user has another means to log in, such as with an SSH key, using usermod -L will not prevent their login.

The file pxelinux.0 must exist within /tftpboot on the TFTP server in order for a system to use PXELINUX for booting. The other files are not valid or necessary for PXELINUX. Once booted, PXE boot can boot using an NFS-mounted filesystem where the filesystem is physically hosted on a different computer.

A file with a .yml extension usually contains YAML. The question also gave a hint of infrastructure as code, where many tools use YAML for configuration and procedures.

The -r option displays a report including CPU time and exit status about the justcompleted fsck operation. The -f option forces whatever operation is being requested, -s serializes fsck operations, and -l creates an exclusive flock.

The -P option makes the values persistent across reboots. The other options are not valid with setsebool

The format when adding a username places the username between the schedule and the command to run, thereby making option A correct. The other options shown for this question are invalid. In the case of option B, there is no schedule. In the case of options C and D, the schedule is incorrectly formatted.

The –boot-directory option enables you to specify an alternate location for GRUB images rather than the default /boot. The other options shown for this question are not valid.

The file /proc/meminfo provides a wealth of information about memory usage and utilization. Much of this information is displayed by various commands, but the canonical source for those commands is usually found in this file. Of the other options, only /proc/cpuinfo is valid, and that file provides information on the CPU(s) for the computer.

The directory /etc/apparmor.d/ is the location in which profiles are located.

The passwd command will be used for this purpose. The -a option displays all users but requires the use of -S to indicate status. The -S option alone will not produce a report for all users, and the –all option is an alias for -a.

The shim.efi bootloader loads another bootloader, which is grubx64.efi by default. The other options are not valid filenames for the purpose described.