pipes command of Unix OS,

pipes


$ cat *.txt | sort | uniq > output.txt

•  In this example, cat outputs all text files, which are sorted. All dupicates are than removed and

           the output is saved to a file.

          Example:  $ somecommand | tee output.txt

•  Prints output of a command to stdout and a file!

         Example:  $ somecommand | less

•  Pipe to less for nice navigation.