Using the German keyboard, I have to use a combination of the [Alt] modifier key and other keys to be able to print characters like brackets or the pipe symbol. Using pipes in shell commands, sometimes this happens: $> echo "foo" | wc -l bash: wc: command not found Hm. Weird. “wc” should be present on this system. Let’s check: $> which wc /usr/bin/wc Hm. So why isn’t this working?