Posts Tagged ‘howto’
The first step is, obviously, to install the letsencrypt package. Obviously enough a search for the package (i.e. apt-cache search letsencrypt) shows that this package is not available in the debian jessie distribution. But thanks to the official Debian Backports project, we can get package anyway. Just follow the instructions on the website and then a simple command (apt-get -t jessie-backports install letsencrypt) installs our beloved letsencrypt package.
If you are using apache like me, you should also install the apache plugin for letsencrypt (apt-get -t jessie-backports install python-letsencrypt-apache) and the libaugeas0 (apt-get install libaugeas0) library.
After this, changing your http website to https is easily done via: letsencrypt –apache -d subdomain.example.net . This command asks you some questions and after that, voila, everything is done. No need for any additional configuration.
More information how to use the letsencrypt client or how to install it on other systems can be found in this PDF documentation.
Beware: I don’t know if the renewal of the certificates is now done automatically. If they expire and I have to renew them, I will update this article how to do this.
P.S.: If you are using owncloud and you are battling with trying to tell your linux owncloud-client to use now https instead of http: Don’t wrestle with the graphical interface, it won’t allow you this. Just edit the owncloud config file /home/<YOURUSER>/.local/share/data/ownCloud/owncloud.cfg by changing the url from http to https.
P.P.S.: You can use the online SSL Server Test Service to validate your https Website and get information about how it is configured and if it is vulnerable.
There is an easy way to merge two or more PDF files. You can use the free software called Pdftk. You can get it via the package system of your preferred linux distribution or the homepage of the project.
Here is an example for merging threepdf files
pdftk 1.pdf 2.pdf 3.pdf cat output 123.pdf
You can find more examples on the projects website.
If you find youself struggeling with exporting images from PDFs, don’t give up, there is a solution
… if you’re in my situation (no desire to use Adobe’s bloat) or you just need a small handy command line tool for linux (or other “unixes”): try pdfimages. It’s part of the xpdf package, which is probably available for all major linux distributions.
Usage is very straightforward:
pdfimages -j foo.pdf bar
You can read the rest of the article on Stefaan Lippens Blog.
Why do 66% of all IT projects fail, 20% go over time and budget ? With over 20 years of IT experience, Sander Hoogendoorn talks about project anti-patterns stereotyping them as Titanic projects, Golf course projects and many more.
You can see this talk on Parleys.com. Its about one hour and teach you how to fail a project. You may know some of the anti patterns. But it’s always good to be reminded about it.
If you want to become a programmer in 15 minutes without every leaving your webbrowser but also by writing code… Then try this interactive online ruby tutorial.