GIAC GSNA Exam - Topic 6 Question 66 Discussion

Actual exam question for GIAC's GSNA exam

Question #: 66
Topic #: 6

John works as a Network Administrator for Perfect Solutions Inc. The company has a Linux-based network. John is working as a root user on the Linux operating system. He has a data.txt file in which each column is separated by the TAB character. Now, he wants to use this file as input for a data mining software he has created. The problem preventing him from accomplishing his task is that with his data mining software, he has used TAB as a delimiter to distinguish between columns. Hence, he is unable to use this file as input for the software. However, if he somehow replaces the TAB characters of the file with SPACE characters, he can use this file as an input file for his data mining software. Which of the following commands will John use to replace the TAB characters of the file with SPACE characters?

Aexpand -t 1 data.txt > data.txt

Bcat data.txt

Cchmod 755 data.txt

Dtouch data.txt

Show Suggested Answer

Suggested Answer: D

In Unix, the /etc/securetty file is used to identify the secure terminals from where the root can be allowed to log in.

Answer B is incorrect. In Unix, the /etc/ioports file shows which I/O ports are in use at the moment.

Answer A is incorrect. In Unix, the /etc/services file is the configuration file that lists the network services that the system supports.

Answer C is incorrect. In Unix, the /proc/interrupts file is the configuration file that shows the interrupts in use and how many of each

there has been.

by Natalie at Feb 07, 2025, 05:32 AM

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Alyce

6 months ago

`cat` just displays the file, not what he needs.

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Magdalene

6 months ago

`chmod` doesn't even relate to this problem, what a distraction.

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Marjory

6 months ago

Wait, can you really overwrite the file like that? Sounds risky!

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Timothy

7 months ago

Totally agree, that's the right way to do it!

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Frederick

7 months ago

The command to replace TABs with spaces is `expand -t 1 data.txt > data.txt`.

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Mariann

7 months ago

I don't recall using `chmod` or `touch` for this kind of task, so I'm leaning towards `expand`, but I hope I remember the syntax correctly!

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Mayra

7 months ago

I feel like I've seen a similar question before, and I think `expand` was the answer. It makes sense to convert TABs to spaces for compatibility.

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Corinne

8 months ago

I think the `expand -t 1` command is the right choice here since it specifically mentions replacing TABs, but I might be mixing it up with another command.

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Arlen

8 months ago

I remember practicing with the `expand` command, but I'm not entirely sure if it replaces TABs with spaces or just formats them.

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Charolette

8 months ago

Okay, let's break this down step-by-step. We need to replace the TAB characters with spaces, and the question gives us four options. I think the "expand" command sounds like the best fit, so I'll go with that.

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Ma

8 months ago

I'm not too confident about this one. There are a few options, but I'm not sure which one is the correct answer. I'll have to review the material again and see if I can figure it out.

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Mitsue

8 months ago

Ah, I think I've got it! The "expand" command should do the trick. It can convert TAB characters to spaces, and we can redirect the output to the original file.

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Beckie

8 months ago

Hmm, I'm a bit confused. I know we need to replace the TAB characters, but I'm not sure which command would be the best to use. I'll have to think this through carefully.

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