A PCRE internal error occured. This might be caused by a faulty plugin

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A PCRE internal error occured. This might be caused by a faulty plugin

======f.lux / Xflux====== A [[http://www.pnas.org/content/112/4/1232.full.pdf+html|PNAS study]] demonstrates that the blue color emitted by most computer (and tablet's) screens is affecting sleep. To circumvent this negative effect, a small but efficient little software called f.lux is coming to the rescue. It is available here: [[https://justgetflux.com]]. Well, to get installed on Debian though the information available on the site itself isn't sufficient, as you only get the information about how to install it on Ubuntu using a ppa. To get it working on Debian 7 (Jessie), here is what to do: * Download the 64 bit archive * Unpack it * Put it in /usr/locale/bin * Launch the program with your local coordinates Which translates into the following commands: <code> > wget https://justgetflux.com/linux/xflux64.tgz > tar -xvzf xflux64.tgz > sudo mv xflux /usr/local/bin > /usr/local/bin/xflux -l 50.5 -g 23.5 </code> Your screen will now shift it's white point color temperature, colder (more blue) during the day and warmer (more red) at night.