today's howtos
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Install and Setup ZSH on Ubuntu Linux
Want a cool looking Linux terminal? Try Zsh. Learn how to set up Zsh on Ubuntu Linux with Oh My Zsh.
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Matthew Garrett: Further adventures in Apple PKCS#11 land [Ed: Adventure in proprietary 'security', relying on companies that snitch to the NSA]
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Using Linux hexedit and xxd commands to view and modify binary files | Network World
The hexedit command provides a way to edit binary files, but to view and save the content in a file for later analysis without editing, try the xxd command.