Which command is used to combine three files into a fourth file

File and Text Manipulation Utilities >>> Which command is used to combine three files into a fourth file? >>> Linux Tools for Developers

cat file1 > file2 > file3 > file4

cat file1 file2 file3 > file4

cat file1 > file2 > file3 | file4

cp file1 file2 file3 > file4

This is the correct syntax

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tail -n15 some_file

You don’t need the n but it works

tail=15 some_file

tail -15 some_file

tail +15 some_file

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cat some_file | sed -e s/dog/pig/g

You either give the file as an argument or stream it in, no difference in result

sed -e s:dog:pig:g some_file

You can use either : or / as delimiters

sed -e s/dog/pig/ some_file

sed -e s/dog/pig/g some_file

You can use either : or / as delimiters

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grep {0-5} filename

grep [-e0 -e1 -e2 -e3 -e4 -e5] filename

grep [0,1,2,3,4,5] filename

This is correct syntax

grep [0-5] filename

This is correct syntax

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tee

cut

cut extracts columns