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I have a dell Optiplex 755 usff and I just installed Ubuntu 16.04 on it and I want to install apps on it but outside of the Ubuntu software center. How can I do this and not run into any errors? Also what apps are recommended for a start to ubuntu? I would like java, flash, VNC, Steam, Utilities, and customization apps? (I'm just asking here how can I install applications on Ubuntu without any pre-installed applications and not run into any errors)

  • I can do it, but I have years of training and experience with Linux. Do you? If not, you are on an unwise path toward great frustration. If you are a beginner, then try to use Ubuntu the way it is meant to be used. Learn to ride the bicycle without training wheels before you enter your first race. – user535733 Nov 25 '17 at 1:43
  • That depends on the specific application. Please open a new question for each one as questions about multiple unrelated topics are too broad to answer within the scope of this site. Better yet, search for “install [application name]” on Ask Ubuntu, sort by votes and you should find installation procedure for the most popular applications. – David Foerster Nov 29 '17 at 15:44
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This is indeed broad but simply put you install apps outside Ubuntu Software Center by using .deb file and installing them from the commandline or terminal. The steps are simply:

  1. Download the file say: myapp.deb
  2. Open terminal with Ctrl+Alt+t
  3. Type: sudo dpkg -i myapp.deb
  4. Get any dependency errors from step 3, then do:

    sudo apt install -f
    sudo apt update
    
  5. Repeat step 3

Please spend some time reading about Ubuntu in general so you will understand the basics.

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  • gdebi is a great alternative to using dpkg. No install -f yadayada simply sudo gdebi package.deb. – Videonauth Nov 25 '17 at 7:26
  • At times the yadayada is good for the soul :-) – George Udosen Nov 25 '17 at 7:42
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You can install apps without using the software center. It does require the use of a terminal, however.

The easiest way if from apt

apt provides a high-level commandline interface for the package management system. It is intended as an end user interface and enables some options better suited for interactive usage by default compared to more specialized APT tools like apt-get(8) and apt-cache(8).

You can use it like:

sudo apt install vlc

and it will install vlc player for you.

The other method is obtaining the .deb files, or download links. To download a deb file, get the URL, and

sudo wget urltodebfile

and then, install with:

sudo dpkg -i debfile.deb

followed by

sudo apt install -f

to fix any missing dependencies.

If you're interested:

dpkg is a tool to install, build, remove and manage Debian packages. The primary and more user-friendly front-end for dpkg is aptitude(1). dpkg itself is controlled entirely via command line parameters, which consist of exactly one action and zero or more options. The action- parameter tells dpkg what to do and options control the behavior of the action in some way.

Note: The quotes are from the man pages

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  • There's one app but I need to know also how to uninstall apps as well as when I uninstall it. It gets rid of everything that it came with the first time I execute it. What other apps can you recommend for me to use on ubuntu 16.04? – CalebO5 Nov 25 '17 at 18:40

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