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Editorial Team
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Asked: 2026-05-17T23:59:35+00:00

I recently installed rubygems 1.3.7. When I try to install rails by typing :gem

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I recently installed rubygems 1.3.7. When I try to install rails by typing :gem install rails I get an error like this:

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

    It looks like your Ruby install is missing the zlib extension.
    If you installed Ruby from source, make sure that you have the appropriate development headers (in Fedora – zlib-devel, in Ubuntu – libzlib-dev or something like this).
    You can check if it’s installed by running the following command:

    ruby -rzlib -e 'puts Zlib::VERSION'
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