Can you answer the following questions thanks! 1. How would you instruct a DNS s

Question

Can you answer the following questions thanks!

1.      How would you instruct a DNS server to respond only to queries from the137.44.* IP range?

2.      What is SHA2? How does it work to ensure that an ISO image file you download is correct?

3.      What is a live system? What advantages does it have over an installed system?

4.      Describe the Anaconda installer.

5.      Describe Disk Druid.

6.      Is each of the following an absolute pathname, a relative pathname, or a simple filename?

1.      silk_co

2.      correspond/business/milk_co

3.      /home/max

4.      /home/max/literature/promo

5.      ..

6.      letter.0210

7.      What is an inode? What happens to the inode when you move a file within a file system?

8.      Explain the following error message. Which filenames would a subsequent ls display?

$ ls

abc abd abe abf abg abh

$ rm abc ab*

rm: cannot remove 'abc': No such file or directory

9.      Describe the similarities and differences between these utilities: a. scp and ftp

Explanation / Answer

1)Answer:

Add the following line to the Options clause in /etc/bind/named.conf:

allow-query { 137.44.0.0/24 };

2)Answer:

SHA2 (Secure Hash Algorithm 2) is the third member of the SHA family(see SHA1), SHA2 is a set of four cryptographic hash functions named SHA-224, SHA-256, SHA-384,SHA-512 with digests that are 224, 256, 384, and 512bits, respectively. It works within the CHECKSUM file in which generates anumber based on the file, and if the iso number matches the initial number inthe CHECKSUM file, it is then pronounced correct.

3)Answer:

A live system (or session) is a Linux session you can run on yourcomputer without having to install Linux onto your computer. One initialadvantage it gives you would be that it allows you to preview the system without having to install. Another would include the ability to preserve another system byusing a USB flash drive, Webmail, etc. by transferring files to preserve the system.

an advantage it has over an installed session is you can start fresh everyTme you boot it because it does not save any changes once shut down.

4)Answer:

Anaconda installer was written in Python and C.Its tasks include identifying hardware, building filesystems, andinstalling/upgrading the Fedora/RHEL operating system. I also has the ability torun in textual / graphical (default) interactive mode or in batch mode “Using theKickstart Configurator.

5)Answer:

Disk Druid is an interactive program for editing disk partitions. Users run it only within theFedora installation system. Disk Druid enables you to configure Linux software RAID and LVMto provide more extensible and reliable data storage.

6)Answer:

1.silk_co =simple filename

2.correspond/business/milk=corelative pathname

3./home/max =absolute pathname

4./home/max/literature/promo =absolute pathname

5...= Hidden File or can be used for the relative parent directory

6.Ordanary/Simple File

7)Answer:

The inode contains data about where that file exists within the directory / folderstructure. So the inode is just updated with the new location.

8)Answer:

The shell expands the asterisk wildcard character before it passes a list of filenames to rm. As a result rm receives a list of files that includes abc twice. After rm removes abc, it generates an error message when it is asked to remove abc again. After giving the preceding rm command, ls does not list any files.

9)Answer:

scp is encrypted, including username/passwd, and is part of ssh suite, and usesport 22. It can put a file anywhere you have privilege to.

ftp is plaintext, includingusername/passwd, and uses ports 20, 21, and is usuallyrestricted to an ftp directory on a server.

SCP stands for Secure Copy Protocol, and FTP is an acronym for the File TransferProtocol, which was the original file transfer protocol. SCP and FTP are two applications forcopying files from one computer to another. Both were originally based on their own protocols,but both now use different protocols.

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