Category Archives: Software

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I recently upgraded my webserver to Debian Jessie, which included an upgrade for Apache and PHP. This resulted in a few gotchas…

Mod_python and WSGI don’t play nicely

See my previous post on the subject…

Some PHP extensions not installed

Some PHP extensions didn’t seem to be automatically upgraded/reinstalled (these may have been ones previously only available through PECL), so:

apt-get install php5-gnupg php5-mongo
/etc/init.d/apache2 restart

New permissions

Apache 2.4 uses a different permissions (access / deny) arrangement than before, so you need to change these over.

So for example, where you have:

Order deny,allow
Allow from all

You’d now have:

Require all granted

Apache have a good guide here.

Random crashes with XCache

If you have XCache installed, you might start getting random crashes, often with an error about:

“`PHP Fatal error: Cannot redeclare class …“`

This is caused because the installer installs and activates the Zend Opcache module automatically, and you can’t run two opcode caches safely.

php5dismod opcache; /etc/init.d/apache2 restart

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Sitemaps are specially crafted XML files, usually located at https://yourdomain.com/sitemap.xml, that help search engines better crawl your site.

It came up in conversation on IRC that there was a need for a sitemap plugin for Known, and because such a plugin would be useful to myself as well as others (and because I had a little bit of time while waiting for a painfully slow set of Vagrant builds, so I thought I’d put something together.

So, over on github, I’ve put together a quick plugin that will automatically generate a basic sitemap plugin for your site, as well as update your robots.txt accordingly.

When you first visit your sitemap.xml file a sitemap will be generated and cached. When you create new posts, this file will be automatically updated.

It’s pretty simple at the moment, but as usual, pull requests are welcome!

» Visit the project on Github...

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IRC (Internet Relay Chat) is a protocol that lets you communicate in text based chat rooms over the internet, and is basically what we all used to use in the 90’s before Twitter or WhatsApp. Think of it like multi-player notepad.

Most folk don’t even know it exists, but many technical people (especially those in the free software community) use IRC to facilitate discussion and development with people around the world.

I quite often use my Known site to share links with people over twitter and facebook, but to do the same with folk in IRC I’d have to paste the link by hand, and, well… I’m lazy. So I wrote a plugin!

One particularly handy thing you can do, combined with my command line API tools, is that you have a quick way to post from system services or internet connected (IoT) devices… but I’ll leave that as an exercise for the reader.

Known IRC

The Known IRC plugin adds the ability to syndicate short messages and share links to one or more IRC channels.

Once activated and configured, you will be able to syndicate out to IRC straight from your site.

Limitations

There are a couple of limitations of course…

  • IRC only lets you have one nickname per network (freenode, efnet etc), so if you sit on IRC as well, use a different nickname. Also consider registering this name with nickserv (the plugin supports nickserv passwords)
  • The plugin doesn’t perform a persistent login (for various reasons), therefore it’ll join, post and then leave the channel.

» Visit the project on Github...