Hi, there , excuse me for asking this stupid question, but I'm fresh to common-lisp. I knew from http://weitz.de/cl-ppcre/#install that debian can install cl-ppcre from native package, so I use "apt-get install cl-ppcre" to install, and there are no problem during installation, but i don't know how to use it at all, should i just require from REPL? But it get a error. Maybe i just don't know how to use library in lisp, and i'm using clisp.