Howdy, A friend gave me a CD with some very cool astronomical charting/graphing software on it, called "Xephem". I would like to install it on my Mac-based Yellow Dog Linux system, but unfortunately, friend gave me a one-line cryptic sentence as installation instructions ("untar in root) and I don't know what to do next. I have no experience installing software in Linux and friend is unavailable this weekend for installation instructions. Can someone tell me what to do to get this thing installed? Basically I need to know what to type after I put the CD in the drive... from what I understand, "tar" is sort of like a "zip" deal, where the program needs to be "untarred" (unzipped) to install... but I don't know how to "untar" anything. I'm a real green newbie to Linux... can anyone help? Thanks! Jackie -- "All of us are in the gutter, but some of us are looking up at the stars." - Oscar Wilde