LPI 010-160 Exam Dumps

The host command is used to resolve a DNS name to an IP address or vice versa. It can also perform other DNS queries, such as finding the mail servers for a domain. The host command has the following syntax: host [options] [name] [server]. The name argument can be a hostname, such as www.lpi.org, or an IP address, such as 192.168.0.1. The server argument is optional and specifies the name or IP address of the DNS server to query. If no server is given, the default system resolver is used.Reference:

Linux Essentials Version 1.6 Objectives: 1.4.1.Demonstrate an understanding of the purpose and types of DNS records1

Linux Essentials Version 1.6 Exam Study Resources: Linux Essentials Manual - Chapter 10. Network Fundamentals - 10.3. DNS and Hostname Resolution - 10.3.1.The host Command2

Linux Essentials Version 1.6 Exam Study Resources: Linux Essentials Manual - Appendix A. Answers to the Exercises - Chapter 10. Network Fundamentals - 10.3.DNS and Hostname Resolution - Exercise 10.3.12

The tar command is used to create or extract compressed archive files that contain multiple files or directories. The tar command has the following syntax: tar [options] [archive-file] [file or directory...]. The options argument specifies how the tar command should operate and what kind of compression should be used. The archive-file argument is the name of the archive file to be created or extracted. The file or directory argument is the name of one or more files or directories to be included in or extracted from the archive file.

The following are some of the common options for the tar command:

-c: create a new archive file.

-x: extract files from an existing archive file.

-t: list the contents of an archive file.

-v: show the progress of the operation.

-f: specify the name of the archive file.

-z: use gzip compression or decompression.

-j: use bzip2 compression or decompression.

-J: use xz compression or decompression.

The options -z and -j are used to handle compression with the tar command. The option -z uses the gzip program to compress or decompress the archive file, which usually has the extension .tar.gz or .tgz. The option -j uses the bzip2 program to compress or decompress the archive file, which usually has the extension .tar.bz2 or .tbz. Both gzip and bzip2 are popular compression programs that reduce the size of files by removing redundant or unnecessary information.

For example, to create a compressed archive file called backup.tar.gz that contains the files and directories in the current directory, the following command can be used:

tar -czvf backup.tar.gz .

To extract the files and directories from the archive file backup.tar.gz to the current directory, the following command can be used:

tar -xzvf backup.tar.gz

To create a compressed archive file called backup.tar.bz2 that contains the files and directories in the current directory, the following command can be used:

tar -cjvf backup.tar.bz2 .

To extract the files and directories from the archive file backup.tar.bz2 to the current directory, the following command can be used:

tar -xjvf backup.tar.bz2

The other options in the question are not related to compression. The option -bz is invalid, as there is no such option for the tar command. The option -g is used to create or update an incremental archive file, which only contains the files that have changed since the last backup. The option -z2 is also invalid, as there is no such option for the tar command.Reference:

Linux Essentials Version 1.6 Objectives: 3.1.Archiving Files on the Command Line1

Linux Essentials Version 1.6 Exam Study Resources: Linux Essentials Manual - Chapter 9. The Power of the Command Line - 9.1. Archiving Files on the Command Line - 9.1.1.The tar Command2

Linux Essentials Version 1.6 Exam Study Resources: Linux Essentials Manual - Appendix A. Answers to the Exercises - Chapter 9. The Power of the Command Line - 9.1.Archiving Files on the Command Line - Exercise 9.1.12

Web browser cookies are small pieces of data that are stored by a website on a user's browser. They are used to remember information about the user, such as preferences, login details, shopping cart items, etc. Cookies can also be used to identify and track users across different websites, which can have implications for privacy and security. For example, cookies can be used to show targeted ads based on the user's browsing history, or to collect personal information without the user's consent. Cookies are not inherently dangerous, but they can pose some risks if they are misused or compromised by malicious actors.Reference:

Linux Essentials - Linux Professional Institute (LPI), section 1.4.2

1.4 Lesson 1 - Linux Professional Institute Certification Programs, slide 18

The correct command to copy the two files ending in .txt to the /tmp/ directory iscp *.txt /tmp/. This command uses the wildcard character*to match any number of characters before the.txtextension. Therefore, it will copy bothtexts 1.txtandtexts 2.txtto the destination directory/tmp/. The other options are incorrect because they use different wildcard characters or syntax that do not match the desired files. For example, option A uses??to match exactly two characters before the.txtextension, but the files have a space and a number, which are not considered as one character. Option C uses a backslash\to escape the dot.before the.txtextension, but this is unnecessary and will cause the command to fail. Option D uses?to match exactly one character before the.txtextension, but the files have more than one character. Option E uses$?to match the exit status of the previous command before the.txtextension, but this is not relevant and will cause the command to fail123Reference:1: Linux wildcards | How do wildcards work in Linux with examples?- EDUCBA2: Wildcards in Linux explained with 10 examples | FOSS Linux3: What are wildcard characters in Linux? -- Sage-Answers

The /var directory must be mounted with read and write access if it resides on its own dedicated file system.The reason is that the /var directory contains files and directories that are expected to change in size and content as the normal operation of the system progresses, such as logs, spool files, and temporary files1. Therefore, the /var directory needs to have enough space and permission to accommodate these changes.If the /var directory is mounted as read-only, some system services and applications may fail to start or function properly2.

The other options are not directories that must be mounted with read and write access if they reside on their own dedicated file system.The /opt directory contains optional or third-party software packages that are not part of the default installation1.The /lib directory contains libraries and kernel modules that are essential for the binaries in /bin and /sbin directories1.The /etc directory contains configuration files for the system and applications1.The /usr directory contains user-related programs, libraries, documentation, and data1.These directories are usually mounted as read-only to prevent accidental or malicious modification of their contents3.Reference:

Linux Essentials Exam Objectives, Version 1.6, Topic 102.1, Weight 3

Linux Essentials Certification Guide, Chapter 2, Page 34-35

Linux Filesystem Hierarchy, Chapter 3, Page 17-18