LPI 010-160 Exam With Confidence Using Practice Dumps

 The correct command to set the variable USERNAME to the value bob is USERNAME=bob. This command assigns the string bob to the variable name USERNAME, using the equal sign (=) as the assignment operator. There is no space around the equal sign, and the variable name and value are case-sensitive. This command sets a shell variable, which is only valid in the current shell session. To make the variable an environment variable, which can be inherited by child processes and subshells, you need to use the export command, such as export USERNAME=bob. The other commands are not valid for setting variables in Linux. The set command is used to set orunset shell options and positional parameters, not variables. The $ sign is used to reference the value of a variable, not to assign it. The == sign is used for comparison, not assignment. The var keyword is not used in Linux, but in some other programming languages. The <= sign is used for redirection, not assignment. References:

• Linux Essentials - Linux Professional Institute (LPI)
• How to Set and List Environment Variables in Linux | Linuxize

The execute bit in Linux is a permission bit that allows the user to run an executable file or enter a directory. For regular files, such as scripts or binaries, the execute bit must be set for the user to run them. For directories, the execute bit allows the user to access the files and subdirectories inside. Therefore, to successfully execute the script test.sh, the execute bit should be set in the file’s permissions. This can be done by using the chmod command with the +x option, for example: chmod +x test.sh. The other options are either irrelevant or incorrect. The file’s extension does not affect its executability, only its association with a program. The user executing the script does not need to be in the exec group, as long as the user has the execute permission on the file. The SetUID bit is a special permission bit that allows the user to run the file as the file’s owner, regardless of the user’s identity. This is not necessary for executing the script, and may pose a security risk. The #!./test.sh syntax is invalid, as the #! is used to specify the interpreter for the script, not the script itself. References:

• Linux Essentials Version 1.6 Objectives1, Topic 1.4: Command Line Basics, Subtopic: Basic Shell Commands
• Linux Essentials Version 1.6 Exam Preparation Guide2, Section 1.4: Command Line Basics, Page 16
• Execute vs Read bit. How do directory permissions in Linux work?3

The distribution’s package repository is the preferred source for the installation of new applications in a Linux based operating system. A package repository is a collection of software packages that are maintained by the distribution and can be easily installed, updated, or removed using a package manager. Package repositories offer several advantages, such as:

• They ensure compatibility and stability with the system and other packages.
• They provide security updates and bug fixes for the packages.
• They reduce the risk of malware or corrupted files.
• They simplify the dependency management and configuration of the packages.

The other sources are not preferred because they may not offer these benefits and may cause problems with the system. The vendor’s version management system, the vendor’s website, or a CD-ROM disk may contain packages that are not compatible with the distribution or may conflict with other packages. A retail store may not have the latest or the most suitable packages for the system. References:

• Linux Essentials - Linux Professional Institute (LPI), section 1.3 Installing, Updating and Removing Software Packages
• LPI Linux Essentials Study Guide: Exam 010 v1.6, 3rd Edition, chapter 4 Working on the Command Line, section 4.2 Managing Software
• Table of Contents - Linux Professional Institute Certification Programs, section 1.3 Installing, Updating and Removing Software Packages