Category: Computing

  • How to install the NEOS server 4.0?

    These are the instructions for installing a generic NEOS server, which you can use for many purposes. WARNING: These instructions guide you through a successul installation of NEOS itself, but stop there. NEOS is not usable without adding one or more solvers, and for that you have to develop one XML config file and one […]

  • How to install AWS CLI in Ubuntu 13.10 using packages?

    AWS CLI is the Amazon Web Services command line interface tool, the new unified utility to manage your cloudy Amazon things. People are usually told to install it with pip install awscli (including in the official docs), but this is a hateable solution for Linux package system fans because You get one more package system […]

  • How to fix Skype audio problems in Ubuntu 13.10 on a ThinkPad T61?

    Symptoms This issue started to occur right after installing Ubuntu 13.10 on a ThinkPad T61 with an "Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 03)" according to lspci. So, whenever I do one of these: adjust volume with the hardware volume silence / up / down buttons, only while not in a Skype […]

  • How to make Freemind and Checkvist work together?

    Checkvist is a nice, web-based ouline editor. Since it uses a hierarchical content structure, and a mindmapping software like Freemind does the same, interfacing between them can work well in theory. There are some quirks and tips though that we will explore here in practice. I selected Checkvist among alternative solutions for the following reasons: […]

  • How to configure HTTPS securely?

    Wait, the *Secure* Socket Layer in HTTPS can be insecure? Yep, in the age of total surveillance, it can. Good news: To the best of our knowledge, there is also secure SSL still. (But don't trust me on these instructions with your life or the life of your website users – you have to become […]

  • Hiding ham in spam: Deniable communication under total surveillance

    This is an intellectual challenge: how to design a generic, many-to-many communication system that prohibits surveillance entities from proving that you (1) read some website or (2) contributed content to some website, even if they do (1) capture and analyze all traffic on the Internet and (2) can break all encryption that is used for […]

  • How to fix “530 Login authentication failed” for ISPConfig FTP logins?

    Symptoms You have installed the ISPConfig server admi panel (in my case, version, all according to their guidelines called "The Perfect Server". In this case, I used the setup instructions for ISPConfig 3 on Debian 7.0 Wheezy with Apache2, BIND, Dovecot. Then you create a website in ISPConfig, create an FTP account for it […]