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Linux
Best CS Books
The Linux Command Line
Designed for the new command line user, this 537-page volume covers the same material as LinuxCommand.org but in much greater detail.
The Linux Development Platform
Setting up a complete development environment using open source tools
What Every Computer Programmer Should Know About Memory
As CPU cores become both faster and more numerous, the limiting factor for most programs is now, and will be for some time, memory access.