If you ever connected to the Internet before the 2000s, you probably remember that it made a peculiar sound. But despite becoming so familiar, it remained a mystery for most of us. What do these sounds mean?

Generate graphic showing bgp route to get to a certain ip

Google recently released the deepdream software package for generating images like
https://github.com/google/deepdream

YTFS - File system which enables you to search and play movies from YouTube as files - with tools of your choice.

These commands can tell you what key bindings you have in your bash shell by default.

bind -P | grep 'can be'
stty -a | grep ' = ..;'

Self-contained C/C++ profiler library for Linux

SSH can use a variety of authentication methods, such as passwords and key pairs. Less common, and not particularly user friendly, are methods like OPIE. The latter is available per default in FreeBSD (and a few other BSDs I believe), but I can't recall a single case where I've seen it being used in the wild. Other implementations, like Google Authenticator make MFA easy to integrate and use, without being too disruptive for the user.

The idea behind it is as follows: classes should not define any of the special functions (copy/move constructors/assignment, and the destructor) unless they are classes dedicated to resource management.