Over the weekend I’ve been looking around for a free service which monitors my websites. My requirement was that I want to be able to monitor both HTTP and HTTPS sites, I need support for authentication and the monitoring service should be able to check if a specific keyword exists within the watched site (instead of just assuming that a HTTP Status Code 200 is okay). Furthermore, I needed notifications in case of downtimes (Email and Pushbullet is fine for me).
On my MacBook with Mac OS X 10.11 (El Capitan) and Docker 1.12.0, Docker did not read manually set DNS entries from the /etc/hosts file.
For more than 2.5 years, I’ve now been running FHEM with several HomeMatic sensors and actors. Using the HM-CFG-LAN Configuration Tool as an I/O interface between FHEM and the HomeMatic devices, this setup has been running smoothly most of the time. The configuration was a bit tricky now and then, but it worked. However, OpenHAB seems to become a really good choice. Version 2 is currently available as Beta 3. It features a modern web interface and an easy-to-use extension manager. More than a good reason to have a look at it. In this post, I’m going to show how to get started.
Several months ago, I wrote a blog post about reducing a PDF file’s size. Since then, I’ve used that technique many times. However, you may want to control the DPI (dots per inch) even more specific. Here’s how to do it:
IPv6 aimed to make Network Address Translation (NAT) obselete as there are so many addresses available that every single device can have its own worldwide unique IPv6 address. However, even with IPv6, using NAT is a very simple way to get your devices behind a Dell SonicWall connected to IPv6 services on the internet. In contrast to going without NAT, all the devices behind your SonicWall will emerge under the SonicWall’s IPv6 address.
Using a single line of GhostScript command on my Ubuntu’s terminal, I was able to reduce the size of a PDF file from 6 MB to approximately 1 MB:
gs -dNOPAUSE -dBATCH -sDEVICE=pdfwrite -dCompatibilityLevel=1.4 -dPDFSETTINGS=/screen -sOutputFile=output.pdf input.pdf