I am hunting around for a good desktop reference guide to Linux administration. I can of course use the Internet and man pages, but sometimes I prefer to have a reference book. There are a lot of books out there, but I thought you might have a favorite you'd like to recommend. I want something that's basic but detailed and has useful practical examples that explain common Linux system programs and utilities. My main interest is in managing and optimizing my own personal computer (mainly file system and memory management, not networking). Examples would be how, why, and when best to use programs such as top (htop), ps, vmstat, dstat, grep, bash, vi, apt, etc for analyzing, monitoring and tweaking. I am also very interested in kernel optimization and compiling. Great if I can buy it for less than $30 or so. I will be using Ubuntu and/or Debian on my new laptop which has an i7 quad processor and an SSD drive., if that makes any difference, as well as an old junkie laptop for experimentation. Thanks!