Dave Taylor 
Learning Unix for OS X [PDF ebook] 
Going Deep With the Terminal and Shell

Think your Mac is powerful now? This practical guide shows you how to get much more from your system by tapping into Unix, the robust operating system concealed beneath OS Xs beautiful user interface. OS X puts more than a thousand Unix commands at your fingertipsfor finding and managing files, remotely accessing your Mac from other computers, and using freely downloadable open source applications.If youre an experienced Mac user, this updated edition teaches you all the basic commands you need to get started with Unix. Youll soon learn how to gain real control over your system.Get your Mac to do exactly what you want, when you want Make changes to your Macs filesystem and directories Use Unixs find, locate, and grep commands to locate files containing specific information Create unique "super commands" to perform tasks that you specify Run multiple Unix programs and processes at the same time Access remote servers and interact with remote filesystems Install the X Window system and learn the best X11 applications Take advantage of command-line features that let you shorten repetitive tasks