All 101-500 Test Inside LPI Questions

The command rpm -qpl apache-ql.rpm is used to preview the list of files that would be installed by the RPM package file apache-xml.rpm. This command queries the package file without installing it and lists the contents of the package. Here’s what each part of the command means:

• rpm is the command-line tool used for managing RPM packages on Linux systems.
• -qpl are options for the rpm command.
• apache-xml.rpm is the name of the RPM package file you want to query.

So, when you run this command, it will display a list of all the files that are included in the apache-xml.rpm package file, without installing it. This can be useful for checking what files are included in the package before installing it or comparing it with another version of the package.

The other commands are either invalid or do not perform the same function as the correct answer. For example:

• rpm -qp apache-xml.rpm will only display the name and version of the package, not the list of files.
• rpm -qv apache-xml.rpm will display the verbose information about the package, such as the description, license, and changelog, but not the list of files.
• rpm -ql apache-xml.rpm will list the files that are installed on the system by the apache-xml.rpm package, but only if the package is already installed. If the package is not installed, it will return an error.

References:

• 4 ways to list files within a rpm package in Linux
• How to list all files installed by RPM package
• How to List Files Installed From an RPM Package in CentOS?
• How to list all files contained in an RPM package

SysVinit is a program for Linux and Unix-based systems that initializes the system and spawns all other processes. It runs as a daemon and has PID 1. The boot loader starts the kernel and the kernel starts SysVinit. A Linux or Unix based system can be started up into various runlevels, which are modes of operation that define what services and processes are running. The /etc/inittab file is the configuration file for SysVinit, which defines the default runlevel, the available runlevels, and the actions to be taken when entering or leaving a runlevel.

The telinit command is used to change the current runlevel of the system or to send a signal to SysVinit. The telinit command takes a single argument, which can be either a runlevel number (0-6) or a special character. The syntax of the telinit command is:

telinit [runlevel|character]

The runlevel argument instructs SysVinit to switch to the specified runlevel. For example, to switch to runlevel 3, which is the multi-user mode with networking, use the following command:

telinit 3

The character argument instructs SysVinit to perform a special action. For example, to reboot the system, use the following command:

telinit 6

The q character argument instructs SysVinit to reload its configuration file, /etc/inittab, without changing the current runlevel. This is useful when the /etc/inittab file has been modified and the changes need to be applied. For example, to reload the /etc/inittab file, use the following command:

telinit q

The other options are not correct because:

• A. reinit: This command does not exist in the Linux system. There is no such command as reinit in the Linux documentation or the man pages.
• B. initreload: This command does not exist in the Linux system. There is no such command as initreload in the Linux documentation or the man pages.
• C. telinit 7: This command is not valid because 7 is not a valid runlevel number. The valid runlevel numbers are 0-6, where 0 means halt, 1 means single-user mode, 2 means multi-user mode without networking, 3 means multi-user mode with networking, 4 means user-defined, 5 means graphical mode, and 6 means reboot. If you run this command, you will get an error message saying:

telinit: invalid runlevel: 7

• E. init reinit: This command is not valid because reinit is not a valid argument for the init command. The init command is a synonym for the telinit command, and it takes the same arguments as the telinit command. The valid arguments for the init command are either a runlevel number (0-6) or a special character. If you run this command, you will get an error message saying:

init: invalid runlevel: reinit

References:

• SysVinit - ArchWiki
• telinit(8) - Linux manual page
• Linux Init RunLevels Explained - nixCraft

 The vi editor is a text editor that operates in two modes: command mode and insert mode. In command mode, the user can enter commands to perform various operations on the text, such as copying, pasting, deleting, moving, searching, etc. In insert mode, the user can type text into the file. To switch from command mode to insert mode, the user can press i, a, o, or other keys. To switch from insert mode to command mode, the user can press Esc. The yy command is used to copy (yank) the current line into a buffer. The number before the yy command specifies how many lines to copy, starting from the current line. Therefore, the command 17yy will copy the current line and the following 16 lines (17 lines total) into a buffer. The buffer can then be pasted into another location by using the p or P command. Note that the command 17yy does not paste the copied lines, it only copies them. References:

• LPI 101-500 Exam Objectives, Topic 103.8, Weight 4
• LPI Learning Materials, Chapter 3.8, Advanced Scripting
• Web Search Results, 1

 When a hard link pointing to a file is created, the link count of the file is increased by one. The link count is the number of hard links that refer to the same inode. The file size, modify timestamp, inode number and permissions are not affected by creating a hard link. References:

• LPI Exam 101 Detailed Objectives, Topic 104: Devices, Linux Filesystems, Filesystem Hierarchy Standard, Weight: 9, Objective 104.5: Create and change hard and symbolic links
• LPI Linux Essentials Study Guide, Chapter 4: The Linux Filesystem, Section 4.3: Hard and Symbolic Links, Page 81