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 0.0.31.144: 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…

php7

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:http://askubuntu.com/questions/192645/make-command-not-found I tried this, but still had problems so I did…

PHP

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 Dotdeb.org or MariaDB.org 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…