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Editorial Team
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Asked: 2026-05-23T08:30:25+00:00

I’m new to Ruby on Rails. I’m trying to install rails on an ubuntu

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I’m new to Ruby on Rails. I’m trying to install rails on an ubuntu linux platform. I’ve already installed RVM and ruby. When I type 

gem install rails --version 3.0.0

I get this error:

ERROR:  Loading command: install (LoadError)
    no such file to load -- zlib
ERROR:  While executing gem ... (NameError)
    uninitialized constant Gem::Commands::InstallCommand

Please help me install rails and learn a bit about the command line while I’m at it.

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1 Answer

  1. Editorial Team

    looks like you dont have ZLib installed. try gem install zlib and also apt-get install zlib zlib-dev if you dont have the system library installed

    you need both the .so c-extension files (apt-get)
    and the ruby interface to them (gem )

    also this may be the same thing as in Antother Stackoverflow Question

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