“Exploring the Java Archive (JAR) Format” by Kulvir Bhogal. A terse Samba tutorial. Debian’s Apt How-To. Extant Gopher servers at Floodgap.com and Quux.org. Bash programming guides at arachnoid.com and Rutgers University. Furl, an online “filing cabinet” for saved webpages. Ad-blocking host files and advice about curbing ads and spyware under Windows. A big collection of links to online computer books at Ju Rao’s homepage.