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jimonanhai3804

?????????


Assuming that a file system uses:
- file blocks of 1024 B each;
- block addresses of 4 B each;
- i-nodes with 12 direct links, 1 singly-indirect link, 1 doubly-indirect link, 1 triply-indirect link.
Which of the following statements are true?

anloxm

Which of the following are examples of relative pathnames?
        1.        

../bin
        2.        

/etc
        3.        

etc
        4.        

/home/jsmith/USP

xuan : 1 & 3

jimonanhai3804

怎么做?
Assuming file food.txt exists and you have all sorts of permissions, upon execution of command head -6 < food.txt >> essentials.txt
               

The first 6 lines of food.txt are appended at the end of file essentials.txt, if it existed.
               

If file essentials.txt existed, its content is deleted before execution of command head.
               

If file essentials.txt did not exist, the first 6 lines of food.txt are displayed on the screen.
               

If file essentials.txt did not exist, it is created and the first 6 lines of food.txt are stored into it.

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xiudou401

you shi ni nian chun lai dao

a002041

#!/usr/bin/perl
$arg = $ARGV[0];
print "Hello $arg\n";
1

a002041

#!/usr/bin/perl
$arg = $ARGV[0];
print "Hello $arg\n";
4