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Unix

Unix
Which command is used to remove a directory?

rmdir
dldir
rdir
rd

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Unix
Which of the following is invalid filename?

trial
my .file
TRY
None of these

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Unix
Which of the following special shell variables is used to process number of the current shell?

None of these
$!
$$
$*

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Unix
Which of the following options will be used to display number of blocks used by a file?

None of these
-r option
-c
#NAME?

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Unix
Which option will be used with touch command to change the access time?

-r option
None of these
pid
#NAME?

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Unix
Which command is used to display the end of the file?

head - r
bof
None of these
eof
tail

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