This is just an alternative way to install Scribus on any ubuntu release.
While I was trying to install Scribus on my pc, I noticed that on the wiki page there were 2 repositories for each Ubuntu release.In addition to that, the code which is posted on the site doesn't add the gpg keys of the repository(The command is wrong).
To simplify the whole process of adding Scribus repository to the source list, I decided to write down a command, which automatically recognizes your ubuntu release(It adds the two Scribus repos with ONE SINGLE COMMAND and it's compatible with ANY UBUNTU RELEASE) and adds the gpg keys of the repository.
Just open your terminal and paste these commands into your terminal.
!!!NOTE:IN ORDER TO WORK, THE SCRIBUS REPOSITORY FOR YOUR RELEASE MUST EXIST!!!
1)ADDING THE REPOSITORIES AND KEYS
echo deb
http://debian.scribus.net/debian/ $(lsb_release -cs) main | sudo tee -a /etc/apt/sources.list && echo deb
http://debian.tagancha.org/debian/ $(lsb_release -cs) main | sudo tee -a /etc/apt/sources.list && gpg --keyserver pgpkeys.mit.edu --recv-key 5BC4CFB8EEF818CF && gpg -a --export 5BC4CFB8EEF818CF | sudo apt-key add - && sudo apt-get update
2)INSTALLATION OF SCRIBUS OR SCRIBUS-NG
INSTALLATION OF SCRIBUS
sudo apt-get install scribus
INSTALLATION OF SCRIBUS-NG
sudo apt-get install scribus-ng