.deb file can be install directly in Ubuntu.

It just need special command or tools to run .deb file :)

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Using Command Line Method

1. Before installation
$ sudo dpkg -i filename.deb

 

2. After installation
$ sudo apt-get install -f
/usr/bin/ruby2.1

 

Using gdebi Method

1. Installation gdebi

$ sudo apt-get install gdebi

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2. Use gdebi
Right click .deb file --> open With --> GDebi Package Installer

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Done. You can now install many .deb file :D.

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