101-500 Exam Dumps : LPIC-1 Exam 101, Part 1 of 2, version 5.0

 This option to the find command is useful if the filenames contain spaces when redirecting the output of find to the xargs command. The syntax of the option is:

find [where to start searching from] [expression determines what to find] -print0

The -print0 option tells the find command to print the full file name on the standard output, followed by a null character (ASCII code 0) instead of the newline character. This allows file names that contain spaces or other special characters to be correctly interpreted by the xargs command, which can use the -0 option to read items from the standard input that are terminated by a null character. The syntax of the xargs command with the -0 option is:

xargs -0 [command]

The -0 option tells the xargs command to expect the items from the standard input to be separated by a null character, and to execute the command using the items as arguments.

Therefore, the command find … -print0 | xargs -0 … will search for files and directories using the find command, print the results with a null character as the separator, pipe the output to the xargs command, which will read the items with a null character as the separator, and execute another command using the items as arguments. This will avoid any problems with filenames that contain spaces or other special characters.

The other options are incorrect for the following reasons:

• A, -rep-space: This option does not exist in the find command. There is no option to replace spaces in the filenames with another character in the find command. The command will report an error and exit.
• B, -printnul: This option does not exist in the find command. There is a similar option, -print0, which prints the filenames with a null character as the separator, but -printnul is not a valid option. The command will report an error and exit.
• C, -nospace: This option does not exist in the find command. There is no option to ignore spaces in the filenames in the find command. The command will report an error and exit.
• D, -ignore-space: This option does not exist in the find command. There is no option to ignore spaces in the filenames in the find command. The command will report an error and exit.

References:

• How to Use the find Command in Linux - How-To Geek
• find command in Linux with examples - GeeksforGeeks
• find(1) - Linux manual page - man7.org
• [xargs command in Linux with examples - GeeksforGeeks]
• [How to Use the xargs Command on Linux - How-To Geek].

 The daemon that handles power management events on a Linux system is acpid. A daemon is a background process that runs continuously and performs certain tasks without user intervention. The acpid daemon listens for power management related events, such as switching between AC and battery power on a laptop, pressing the power button, closing the lid, etc., and executes various commands in response. The acpid daemon can be configured by editing the files in /etc/acpi/events and /etc/acpi/actions directories, or by using a graphical tool like gnome-power-manager or xfce4-power-manager. The acpid daemon is part of the 101.1 Determine and configure hardware settings topic of the LPI Linux Essentials certification program12. References:

• Linux Essentials - Linux Professional Institute Certification Programs1
• Exam 101 Objectives - Linux Professional Institute2
• Power management - ArchWiki2
• 9.12. Power Management: Advanced Configuration and Power Interface (ACPI)

 udev is a device manager that dynamically creates and removes device nodes in the /dev/ directory. It also handles device events, such as adding, removing, or changing the attributes of devices. udev uses rules to match devices and assign properties, permissions, names, symlinks, and other actions. The rules are stored in files under /lib/udev/rules.d/ and /etc/udev/rules.d/. The latter directory can be used to create additional or override existing rules. The /dev/ directory is not a regular directory on the root filesystem, but a virtual filesystem of type tmpfs that is mounted by udev during system startup. tmpfs is a filesystem that resides in memory and can grow and shrink dynamically. The content of /dev/ is not stored in /etc/udev/dev, but is created by udev based on the rules and the available devices. udev does not prevent the creation of block or character devices in /dev/ using mknod, but it may overwrite or remove them if they conflict with the rules or the device events. References: LPI Linux Essentials - 1.101.2, LPI Linux Administrator - 102.4