Software Installation – Fix ‘Dependency is Not Satisfiable’ Error

repositorysoftware installationsynaptic

When I try to install glchess in Synaptic

glchess install

I get this error
error

At a certain time I installed the Gnome desktop and a lot of games that came with it and then uninstalled the games. Now I want chess back.
When I downloaded the deb file and tried to install it in Gdebi I got a similar error:
install error glchess

What should I change in repositories?

Best Answer

From your pastebin it looks very much like you have not got the updates repository enabled

enter image description here

Tick this option shown - the refresh your installation before install pyChess

sudo apt-get update && sudo apt-get upgrade

Related Solutions

Ubuntu – “Dependency is not satisfiable” error when trying to install ubuntudico

It looks like the package gambas2-gb-qt-kde has been removed from the repos starting in Oneric. It is still available for Natty and you may get some results by installing the Natty Universe repository and installing it from there. I went and did that and I found that one of the dependencies depends on something from natty main as well, so you'll need to add the following four items to /etc/apt/sources.list

deb http://us.archive.ubuntu.com/ubuntu/ natty universe
deb-src http://us.archive.ubuntu.com/ubuntu/ natty universe
deb http://us.archive.ubuntu.com/ubuntu/ natty-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ natty-updates universe
deb http://us.archive.ubuntu.com/ubuntu/ natty main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ natty main restricted
deb http://us.archive.ubuntu.com/ubuntu/ natty-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ natty-updates main restricted

Then you'll download the deb for ubuntudico2 from the link you provided and run the following:

sudo apt-get update
sudo dpkg -i ubuntudico2.deb
sudo apt-get install -f

And then it will install. I would recommend removing the extra natty repos after that to prevent issues with packages later on.

Software Installation – How to Install Applications Requiring gksu on Ubuntu 18.04

Introduction

As Jeremy Bicha wrote:

Posted on April 18, 2018 by Jeremy Bicha — 8 Comments

Today, gksu was removed from Ubuntu 18.04, four weeks after it was removed from Debian.

So theoretically speaking there are no packages on Bionic Beaver 18.04 LTS, depending on gksu. But this is not true:

$ apt-cache rdepends gksu
gksu
Reverse Depends:
  gexec
  wicd-gtk
  spacefm-gtk3
  spacefm
 |menu

$ aptitude why gksu 
i   menu Suggests gksu | kde-runtime | ktsuss

As you see some software, which are distibuted by third-party may depend on gksu package. So you can proceed installing gksu with method below on your own risk.

How to fix?

Possible solution is to install version from previous (17.10, artful) release.

Warning: do not execute the commands below if unsure!

Short method (as @MK suggested)

wget http://archive.ubuntu.com/ubuntu/pool/main/libg/libgtop2/libgtop-2.0-10_2.32.0-1_amd64.deb
sudo apt install ./libgtop-2.0-10_2.32.0-1_amd64.deb

wget http://archive.ubuntu.com/ubuntu/pool/universe/libg/libgksu/libgksu2-0_2.0.13~pre1-6ubuntu8_amd64.deb
sudo apt install ./libgksu2-0_2.0.13~pre1-6ubuntu8_amd64.deb

wget http://archive.ubuntu.com/ubuntu/pool/universe/g/gksu/gksu_2.0.2-9ubuntu1_amd64.deb
sudo apt install ./gksu_2.0.2-9ubuntu1_amd64.deb

Test

Test gksu (should work on Xorg-sessions)

gksu-properties # check that it has "Authentication mode" to "sudo"
gksu date
gksudo date

Notes

After installation the following packages will be marked as obsolete (locally-installed): gksu, libgksu2-0. But they will work as expected.