Show reverse dependencies of a package using apt

There is a new bug in libpng right now. When you want to see which package is using libpng (or better: which package depends on libpng), you can do a reverse dependency search:

This shows you a list of packages which directly depend on libpng. It lists all the tools which use the shared…

Failed to connect to Invalid argument

When trying to install Software on Ubuntu, Debian, CentOS,.. and you have your proxy configured wrong, you may get the following error:

To solve it, open your proxy settings and make sure to also add https, like:

Have a look into the following files (if they exist) and look for proxy settings. It’s…


How to install PHP7 on Ubuntu or Debian

Taken from Stackoverflow, credits to @ryannerd. User contributed content licensed under cc-wiki with attribution required. Guide to install PHP7

So far so good. At this point I started having problems:

Reported that I did not have make installed. The solution was found here: I tried this, but still had problems so I did…


Compile PHP 5.6 with pthreads and ZTS Ubuntu/Debian

Compile PHP with pthreads and ZTS on Ubuntu or Debian …and all most common extensions including multi-threading, PDO and mongo extension. 1. Setup your installation path first In the first step, we download the latest PHP sourcecode and download the sourcecode of pthreads and the mongo extension. I know it can be a struggle to…

“kept back” version, dependencies and apt-pinning

When you are using different sources in your Debian installation, for example or Repositories, you may encounter a message like:

How to compare the installed version to the available packages?

You now can execute apt-get dist-upgrade to upgrade all packages, but be warned, this can remove software, add packages and upgrade…