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UNIX

Unix
Which symbol will be used with grep command to match the pattern pat at the beginning of a line?

$pat
pat^
^pat
pat$

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

sort -r
sort
sh
st

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

head
grep
cat
more

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Unix
Which command is used to copy all files having the string chap and any two characters after that to the progs directory?

cp chap?? /progs/*
cp chap?? progs
cp chap* progs
cp chap[12] /progs/*.*

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Unix
Which command is used to change protection mode of files starting with the string emp and ending with 1,2, or 3?

chmod u+x emp[1-3]
chmod u+r ??? emp
chmod 777 emp*
chmod 222 emp?

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