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| Section | Objectives |
|---|---|
| Topic 1: The Power of the Linux Command Line | - Working with Text Streams - Introduction to Shell and Scripting Concepts - Basic Commands and Utilities |
| Topic 2: Security and File Permissions | - Users and Groups - File Permissions and Ownership - Basic Security Concepts |
| Topic 3: Finding Your Way on a Linux System | - Filesystem Navigation - File and Directory Operations - Command Line Basics |
| Topic 4: The Linux Operating System | - Operating System Components - Package Management Basics - Processes and System Resources |
| Topic 5: The Linux Community and a Career in Open Source | - Major Open Source Applications - ICT Skills and Working in Linux - Open Source Software and Licensing - Linux Evolution and Popular Operating Systems |
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NEW QUESTION # 51
Which of the following commands finds all lines in the file operating-systems.txt which contain the term linux, regardless of the case?
Answer: C
Explanation:
Explanation
The grep command is used to search for a pattern in a file or input. The -i option makes the search case-insensitive, meaning that it will match both uppercase and lowercase letters. The grep command takes the pattern as the first argument and the file name as the second argument. Therefore, the command grep -i linux operating-systems.txt will find all lines in the file operating-systems.txt which contain the term linux, regardless of the case. References: Linux Essentials - Topic 103: Finding Linux Documentation and Linux Essentials - Topic 104: Command Line Basics
NEW QUESTION # 52
Which package management tool is used in Red Hat-based Linux Systems?
Answer: E
NEW QUESTION # 53
Which files are the source of the information in the following output? (Choose two.) uid=1000 (bob) gid=1000 (bob) groups=1000 (bob), 10 (wheel), 150 (docker), 1001 (libvirt)(wireshark),989
Answer: B,E
Explanation:
Explanation
The files /etc/passwd and /etc/group are the source of the information in the following output:
uid=1000 (bob) gid=1000 (bob) groups=1000 (bob), 10 (wheel), 150 (docker), 1001 (libvirt) (wireshark), 989 The /etc/passwd file contains information about user accounts, such as the username, password, user ID (UID), group ID (GID), full name, home directory, and login shell1. The /etc/group file contains information about groups, such as the group name, password, group ID (GID), and members2.
The output shows the UID, GID, and group membership of the user bob. The UID and GID of bob are 1000, which can be found in the /etc/passwd file. The groups that bob belongs to are bob, wheel, docker, libvirt, wireshark, and 989, which can be found in the /etc/group file. The group names are shown in parentheses after the GID, except for the last group, which has no name.
The other options are not files that store user and group information in Linux. The /etc/id file does not exist by default. The /home/index file is not a standard file and has no relation to user and group information. The
/var/db/users file is not a standard file and has no relation to user and group information. References:
* Linux Essentials Exam Objectives, Version 1.6, Topic 103.1, Weight 2
* Linux Essentials Certification Guide, Chapter 3, Page 51-52
* Linux Filesystem Hierarchy, Chapter 3, Page 17-18
* Linux Users and Groups, Chapter 2, Page 9-10
NEW QUESTION # 54
What is defined by a Free Software license?
Answer: B
Explanation:
Explanation
A free software license is a notice that grants the recipient of a piece of software extensive rights to modify and redistribute that software. These actions are usually prohibited by copyright law, but the rights-holder (usually the author) of a piece of software can remove these restrictions by accompanying the software with a software license which grants the recipient these rights. Software using such a license is free software (or free and open-source software) as conferred by the copyright holder. Free software licenses grant users the freedom to use it for any purpose, study and change the source code and copy and redistribute the software with or without modifications. Free software must come with source code or provide access to it, while the freedom to redistribute includes the right to give away copies gratis as well as sell copies1 References: 1: Free-software license - Wikipedia
NEW QUESTION # 55
Which of the following commands puts the lines of the file data.csv into alphabetical order?
Answer: D
Explanation:
Explanation
The sort command is used to sort the lines of a file or a stream of input according to a specified criterion, such as alphabetical order, numerical order, reverse order, etc. By default, the sort command sorts the lines in ascending alphabetical order, using the firstcharacter of each line as the key. For example, the command sort data.csv will sort the lines of the file data.csv in alphabetical order and display the output on the screen. If you want to save the sorted output to a new file, you can use the redirection operator (>) to specify the output file name. For example, the command sort data.csv > sorted_data.csv will sort the lines of the file data.csv in alphabetical order and save the output to a new file named sorted_data.csv. The other commands are either invalid or do not perform the sorting operation. The a...z command does not exist, the abc command is a text editor, the wc command counts the number of words, lines, and bytes in a file, and the grep command searches for a pattern in a file or a stream of input. Therefore, the correct answer is B. References:
* Linux Essentials - Linux Professional Institute (LPI), section 2.3.2
* LPI Linux Essentials Study Guide: Exam 010 v1.6, 3rd Edition, chapter 4, page 95.
NEW QUESTION # 56
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