101-500 Dumps With Exact Questions and Answers

 The environment variable LD_LIBRARY_PATH is used to tell the dynamic linker to look in a specific directory for some of a program’s shared libraries. It is a colon-separated list of directories that are searched by the dynamic linker when looking for a shared library to load1. The directories are searched in the order they are mentioned in. For example, if we have a program that depends on a shared library libfoo.so that is located in /home/user/build/lib, we can run the program with:

LD_LIBRARY_PATH=/home/user/build/lib ./program

This will instruct the dynamic linker to search for libfoo.so in /home/user/build/lib before the default directories. The environment variable LD_LIBRARY_PATH can also be appended to an existing value with the += operator, for example:

LD_LIBRARY_PATH+=:/home/user/build/lib

This will add /home/user/build/lib to the end of the LD_LIBRARY_PATH list. The other options are not valid environment variables for the dynamic linker. LD_LOAD_PATH, LD_LIB_PATH, and LD_SHARE_PATH are not recognized by the dynamic linker. LD_RUN_PATH is a linker option that can be used to embed a librarysearch path in the executable at link time, but it is not an environment variable that can be set or modified at run time2. References:

• LPI Exam 101 Detailed Objectives, section 1.101.3
• ld-linux(8) — Linux manual page
• Setting the dynamic linker with an environment variable - narkive

The command that can be used to download the RPM package kernel without installing it is yumdownloader kernel. This command is part of the yum-utils package, which contains a suite of helper tools for yum package manager. To use this command, you need to install the yum-utils package first1. The downloaded package will be saved in the current directory. You need to use root privilege because yumdownloader will update package index files during downloading. Unlike yum command, yumdownloader will not download any dependent packages1.

The other commands are either invalid or do not have the desired functionality. yum download --no-install kernel is not a valid yum command, as yum does not have a --no-install option2. rpm --download --package kernel is not a valid rpm command, as rpm does not have a --download or a --package option3. rpmdownload kernel is not a standard Linux command. rpm has a native support to download a package from a URL and install it, but not to download a package without installing it4.

References:

• How to use yum to download an RPM package without installing it - Xmodulo
• yum(8) - Linux manual page
• rpm(8) - Linux manual page
• How to download an RPM package and install it in one line?

The dd command is used to copy data from one device or file to another, with optional parameters to specify the block size (bs), the number of blocks to copy (count), and other options. The bootloader is typically located in the first 440 bytes of the disk, which is the Master Boot Record (MBR) area. The MBR also contains the partition table, which starts at byte 446 and occupies 64 bytes. Therefore, to overwrite the bootloader without affecting the partition table or any data following it, the command should copy 440 bytes from /dev/zero (a special device that provides null bytes) to /dev/sda (the disk device) and stop after one block. This is achieved by the command: dd if=/dev/zero of=/dev/sda bs=440 count=1 References:

• LPI Exam 101 Detailed Objectives, section 1.101.3
• dd man page
• Master Boot Record