06-02-2011
Need answer for these LINUX questions URGENT!!
I am very new to LINUX and could not find answer to these questions please submit your comments and suggestions to answer these questions.
Appreciate your time thank you,
1. Make sure there is no filename1.txt in current directory first. Now, enter vi with "vi filename1.txt" command. vi indicates that it is a new file. After you have completed entering text, you issue the VI command
:wq filename2.txt
to save and exit. Which file is created by VI editor? Explain.
2. Make sure there are no files called file1.txt and file2.txt in the current directory. Then, issue the following commands:
ln –s file1.txt file2.txt
ln –s file2.txt file1.txt
cat file1.txt
What is the error message you got? Explain why.
3. If you look at the permissions associated with a symbolic link, it has universal access. Does this lead to security issues? Why?
4. Review the man pages of ln, cp and mv commands. The synopsis section of the man pages contain the usage and the optional arguments are indicated within […]. From these 3 man pages, find out which command can work with just 1 argument. Give a sample usage and explain what it does.
5. Let us assume that Linux does not have .. entries in Linux directory structure. How will you cd to the parent directory of current directory? Note: Since current directory can be anything, you should give a generic answer (you should explain the process).
Moderator's Comments:
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Homework. Closed.
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Last edited by Scott; 06-02-2011 at 09:46 AM..
Reason: Closed thread
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LEARN ABOUT REDHAT
purity
PURITY(6) Games Manual PURITY(6)
NAME
purity - a general purpose purity test
SYNOPSIS
/usr/games/purity [ flags ] [ testname ]
DESCRIPTION
Purity is an interactive purity test program with a simple, user interface and datafile format. For each test, questions are printed to
the your terminal, and you are prompted for an answer to the current question. At a prompt, these are your choices:
y Answer "yes" to the question.
n Answer "no" to the question.
b Backup one question, if you answered it incorrectly, or someone is watching you take the test, and you don't (or do) want to
admit a different answer.
r Redraw the current question.
q Quit the test, and print the current score.
? Print a help screen for the current prompt.
k Kill a section of the test. This skips all the questions of the test until the next subject heading.
a Toggle answer mode between real answers and obfuscated answers. Real answers print "yes" and "no", while obfuscated answers
are "Maybe" and "maybe". Obfuscated answers are preferred if you are shy, and don't want people to be able to read your
answers over your shoulder as you take the test.
d Toggle dERanGe output.
s Print your current score on the test you are taking.
l Toggle score logging.
At the end of the test, your score is printed out. For most purity tests, lower scores denote more "experience" of the test material.
FLAGS
These are the command line flags for the test.
-a Show real answers (i.e. "yes" and "no") instead of obfuscated ones (i.e. "Maybe" and "maybe") as you answer the questions.
-d PrINt THe tESt in DerANgeD pRInT.
-f Take the test in fast mode. Only the questions are printed, and not any other text blocks, like the introdution, subject
headers, and the conclusion.
-l Take the test without having your score logged.
-p Print the test without prompting for answers. This is useful for making hard copies of the tests without having to edit out
the prompts by hand.
-r Decrypt the test using the Rot 13 algorithm. This is done as a form of "protection", such that if you read a rot13 test and
it offends you, it's your own fault.
-z zoom through more prompts in large text blocks. The default is to prompt the user for more when a screenful of text has been
printed without any user input.
DATAFILE FORMAT
The format of the datafiles is a very simple format, intended such that new tests can quickly and easily be converted to run with the test.
There are four types of text in a purity test datafile. Each type is contained in a bracket type of punctuation. The definitions are as
follows:
the styles of text blocks are:
{ plain text block }
[ subject header ]
( test question )
and < conclusion >
Plain text blocks are printed out character for character.
Subject headers are preceded by their subject numbers, starting at 1, and then printed as text blocks.
Questions are preceded by their numbers, and then prompt the user to answer the question, keeping track of the user's current score.
Conclusions first calculate and print the user's score for the test, then print out the conclusion as a text block.
If you wish to include any of the various bracket punctuation in your text, the backslash ("") character will escape the next character.
To print a question with parentheses, you would use the following format:
(have you ever written a purity test (like this one)?)
the output would be this:
1. have you ever written a purity test (like this one)?
and then it would have asked the user for her/his answer.
For a generic datafile, use the "sample" datafile for the test.
FILES
/var/games/purity.scores the score logfile
/usr/share/games/purity/* test data files
AUTHOR
Eric Lechner, lechner@ucscb.ucsc.edu
18 December 1989 PURITY(6)