Cfrgtkky

I am trying to get Viber on my new Ubuntu 18.04 but I get these error ...

sudo dpkg -i Downloads/viber.deb 

(Reading database ... 138136 files and directories currently installed.)

Preparing to unpack Downloads/viber.deb ...

Unpacking viber (7.0.0.1035) over (7.0.0.1035) ...

dpkg: dependency problems prevent configuration of viber:

 viber depends on libcurl3; however:

  Package libcurl3 is not installed.



dpkg: error processing package viber (--install):

 dependency problems - leaving unconfigured

Processing triggers for gnome-menus (3.13.3-11ubuntu1) ...

Processing triggers for desktop-file-utils (0.23-1ubuntu3) ...

Processing triggers for mime-support (3.60ubuntu1) ...

Processing triggers for hicolor-icon-theme (0.17-2) ...

Errors were encountered while processing:

 viber

The problem is not only with the viber.deb file but also with the libcurl3 requirement of viber.deb.

In Ubuntu 18.04 libcurl3 cannot coexist with libcurl4 so you are going to face problems with other applications. In my case Viber and Steam could not coexist.

After some search I found the following solution which is to deb-package, fix the dependency and then build a new viber file.

The steps are:

1. Save the viber.deb file in a folder


2. Open the folder in a terminal


3. execute the following commands


4. dpkg-deb -x viber.deb viber


5. dpkg-deb --control viber.deb viber/DEBIAN


6. Edit viber/DEBIAN/control and replace "libcurl3" with "libcurl4"
   (also delete the last blank line from the file or you will get an error afterwards)


7. dpkg -b viber viberlibcurl4.deb


8. 
   sudo dpkg -i viberlibcurl4.deb or install the .deb file with gdebi
   

Viber seems to work ok with libcurl4 atleast for me until now.

I found the solution here, in a comment...

https://linuxconfig.org/how-to-install-viber-on-ubuntu-18-04-bionic-beaver-linux

sudo dpkg -i --ignore-depends=libcurl3 viber.deb

Works perfectly for me.

Update: @borowis is right: after installing this way it gets uninstalled on fix broken dependencies.
Another one line, but still workable solution is:

sudo apt install libcurl3 ~/viber.deb 

source: https://linuxconfig.org/how-to-install-viber-on-ubuntu-18-04-bionic-beaver-linux

The easiest way is to convert the rpm package on Viber website to a deb package. To do that:

Download the rpm package with:

wget https://download.cdn.viber.com/desktop/Linux/viber.rpm

Install alien, convert the rpm package and install the newly created deb package:

sudo apt-get install alien

sudo alien --to-deb --scripts viber.rpm

sudo dpkg -i viber_7.0.0.1035-3_amd64.deb

The conversion will take about 5 minutes. Be patient!

The solution to installing Viber on Ubuntu 18.04 is to explicitly include the libcurl3 package prerequisite as part of the apt installation command:

sudo apt install libcurl3 ~/Downloads/viber.deb

How to install Viber on Ubuntu 18.04 Bionic Beaver Linux

You can also just install the flatpak version from flathub.org

After trying some above answers I found another solution. There is a cURL PPA which supports both cURL version 3 and 4.

https://launchpad.net/~xapienz/+archive/ubuntu/curl34

So, I added this PPA to my Ubuntu 18.04 and installed cURL from there. Then I installed Viber with this below command-

sudo dpkg -i viber.deb

And Viber is working fine till then.

No broken package warning till now and libcurl4 package is installed.