$ grep -R Arctic /home/ccuser/workspace/geography /home/ccuser/workspace/geography/deserts.txt:Arctic Desert /home/ccuser/workspace/geography/oceans.txt:Arctic Ocean
grep -R searches all files in a directory and outputs filenames and lines containing matched results.
-R stands for “recursive”. Above,
grep -R searched the /home/ccuser/workspace/geography directory for the string “Arctic” and outputted filenames and lines with matching results.
$ grep -Rl Arctic /home/ccuser/workspace/geography /home/ccuser/workspace/geography/deserts.txt /home/ccuser/workspace/geography/oceans.txt
grep -Rl searches all files in a directory and outputs only filenames with matched results (so no lines).
l (a lowercase
L, not a capital
i) stands for “files with matches.” Here
grep -Rl searched the /home/ccuser/workspace/geography directory for the string “Arctic” and outputs filenames with matched results.
grep, search through the working directory (/home/ccuser/workspace/geography) for anything that matches
Island. We want the matching filenames and lines.
Conduct the same search using
grep, but without the matching lines.