Articles posted on 2015

Let's Encrypt

This is a service that let's you get SSL certificates for HTTPS. These certificates are trusted by major browsers. See Let's Encrypt This is a barebones howto to get SSL certificates: git clone https://github.com/letsencrypt/letsencrypt cd letsencrypt This contains the client software for let's encrypt. ./letsencrypt-auto certonly --manual This will start by updating and getting any needed dependencies and then jump to a wizard like configuration to get this done. Follow the prompts and pay special attention on the prompt used to validate your domain. (You need to create a couple of folders and a file with the right content). Afterwards your certificates will be in: ...

undup

So, after a long while, I wrote a new C language program. As usual, the same things that I dislike about C programming popped up, specifically the need for low level data structures and manual memory management. I did learn some new things: ...

Markdown Javascript editors

VUE JS: Includes a Markdown editor example that allows edit with online preview next to it Embeddable JS Markdown editor : Has a button to preview Editors that edit in preview-like mode editor ...

Raspberry Pi Thin Client

Thin Client project want to create a very low price thin client over Raspberry Pi board! Microsoft RDC, Citrix ICA, VMWare View, OpenNX & SPICE RPITC ...

Replacing Emacs with Atom

As an old UNIX guy I have been using emacs for years. So in a way, I am very comfortable with using it and most of keyboard shortcuts. But, it really is an old animal and I have been thinking that I should be moving to a more modern replacement to it for quite ...

Online IDEs

If you want to move to the cloud and like to code like me, this is kinda of a basic necessity. This applies in particular to Chromebook users. 5 Best online IDEs ...

Upload to OpenWRT

Base 64 decoding: coreutils-base64 #!/usr/local/bin/haserl --upload-limit=4096 --upload-dir=/tmp content-type: text/html <html><body> <form action="<% echo -n $SCRIPT_NAME %>" method=POST enctype="multipart/form-data" > ...

Web Links

Here a few web-links to interesting web apps. It covers stuff about password security and checking if web sites are down, etc etc. Down For Everyone or Just Me: If you're getting an error when visiting a certain site, it could be down or something could be wrong on your end. To see which ...

Code Kingdoms

Code Kingdoms is targeted towards six- to 13-year olds and looks very much like your everyday puzzle adventure game. Choose an animal, walk around a kingdom saving animals through puzzles. The difference is most of the puzzles require kids to use code elements to solve the puzzles. At first this is through dragging-and-dropping code snippets, but as they progress, kids will be typing in code themselves. ...

Kerberos Client

This simple mini how-to goes over the configuration of a linux system so it can use a Kerberos Realm server for authentication. Make sure you have the pam_krb5 rpm files installed. You can check this by running the rpm -qa | grep pam command and seeing whether the pam_krb5 rpm files are listed. If they aren't, you can typically download them in an update of the Linux or Unix operating system that you are running. ...

HP Envy 4504 Set-up

I bought a HP Envy 4504. Overall I am happy with it. This is how I configure it so I can use with Linux. This mini howto applies to ArchLinux, void linux and Centos/RedHat distributions. Installation Archlinux: cups, hplip, python2, sane ...

RPMGOT

Software package download proxy rpmgot is a simple/lightweight software package download proxy. It was designed to run on an OpenWRT router with some USB storage. So it is fully implemented as an ash script. The basic idea has been implemented multiple times. For example refer to this article on a squid based implementation. Unlike squid, which once you include all its dependencies can use up over 1MB of space just to install it, this software has very few dependencies. The idea is for small developers running the same operating system version(s) would benefit from a local mirror of them, but they don't have so many systems that it's actually reasonable for them to run a full mirror, which would entail rsyncing a bunch of content daily, much of which may be packages would never be used. rpmgot implements a lazy mirror something that would appear to its client systems as a full mirror, but would act more as a proxy. When a client installed a particular version of a particular package for the first time, it would go fetch them from a "real" mirror, and then cache it for a long time. Subsequent requests for the same package from the "mirror" would be served from cache. ...