March 2015 - Philipp's Tech Blog

Mar 24 / 2015
2

Snippet 0x0B: Bash completion with sub-commands and dynamic options

Every system administrator, most programmers and countless of command line surfing Linux/Mac users use it every day without thinking twice. Hitting the tab key twice, [TAB][TAB], has become the most common thing in the world. Bash completion is the magic behind the tab key. It’s easy to use, but it’s a pain to write. This tiny post demonstrates how to write scripts for bash completion, with sub-commands and dynamic parameters. A working script is embedded in my open source file sync software Syncany.

Mar 23 / 2015
Comments Off on Snippet 0x0A: Cryptography DOs and DON’Ts

Code Snippets, Security

Snippet 0x0A: Cryptography DOs and DON’Ts

This tiny post is meant as a loose collection of DOs and DON’Ts I’ve come across when I implemented the cryptography concept for Syncany, my open source file sync software. I’m not a cryptography expert, so take my advice with caution — and correct me if you know more than I do.

Mar 22 / 2015
2

Linux, Scripting, Security

Circumvent Internet blockages/filters/censorship with socksproxy and netcat

These days, ISPs are often forced to block the access to certain sites, because their government considers these sites dangerous and/or illegal. While one could certainly discuss the usefulness of such measures in great detail, this tiny post focuses on the more interesting subject of how to circumvent these blockages. It’s not a lenghty post, and it doesn’t show all the ways there are, but I’ll show two simple ways to circumvent Internet non-DNS-based filters.