With a small GPS receiver on his wrist, Mike has been jogging through San Francisco neighborhoods. While catching his breath, safe at home, he visualizes the data he acquired while running with Perl.
With the right tools, you can create your own QR code squares with information you want to share, for example, on a business card, in a letter, or on your website.
Many logging and user-related commands can help you check on your system and keep track of security matters. We guide you through several helpful tools.
Sometimes sys admin Charly needs to know when exactly he did something ingenious on one of his servers. Finding an infallible memory aid is difficult, you might think. "Peanuts!" says Charly.
Instead of manually rearranging windows in a development environment time and time again, the Tmux terminal multiplexer can restore them from a configuration script.
