$ sort lakes.txt
sort takes the standard input and orders it alphabetically for the standard output. Here, the lakes in
sort lakes.txt are listed in alphabetical order.
$ cat lakes.txt | sort > sorted-lakes.txt
Here, the command takes the standard output from
cat lakes.txt and "pipes" it to
sort. The standard output of
sort is redirected to sorted-lakes.txt.
You can view the output data by typing
cat on the file sorted-lakes.txt.