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Unix

Unix
Which command is used to sort the lines of data in a file in reverse order

st
sort -r
sort
sh

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Unix
The first set of the three permissions (rw) pertains to the owner of the file, indicating that the owner has

write and executable permissions
None of these
executable permission only
both read and executable permissions.
both read and write permissions

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Unix
The Octal number to be given alogn with chmod command to make a file readable, writable and executable to the owner, readable and executable to group and others is:

755
744
555

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Unix
Which of the following commands is used to display the filenames in multiple columns?

ls -x
lc
ls -1
ls
None of these

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Unix
Which of the following is invalid filename?

None of these
TRY
trial
my .file

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Unix
Which command is used to remove a directory?

rdir
dldir
rd
rmdir

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