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Editorial Team
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Asked: 2026-05-19T22:15:57+00:00

I read a similar post but I am not using ubuntu, and do not

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I read a similar post but I am not using ubuntu, and do not have apt-get.

fyi, uname: x86_64 x86_64 x86_64 GNU/Linux

When attempting to do “gem install rails”, I get 

[root@domU-12-31-39-07-7D-C1 ruby-1.9.2-p136]# gem install rails
ERROR:  Loading command: install (LoadError)
    no such file to load -- zlib
ERROR:  While executing gem ... (NameError)
    uninitialized constant Gem::Commands::InstallCommand

However, when I do “yum install zlib”, it says that is installed.

[root@domU-12-31-39-07-7D-C1 ruby-1.9.2-p136]# yum install zlib
Loaded plugins: fastestmirror, security
Loading mirror speeds from cached hostfile
Setting up Install Process
Package zlib-1.2.3-24.6.amzn1.x86_64 already installed and latest version
Nothing to do

I tryed which zlib and have confirmed it doesn’t exist. Any tips?

Thanks.

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1 Answer

  1. Editorial Team

    Yes! I found an answer here: http://lucaschan.com/weblog/2007/03/22/installing-ruby-on-rails-on-centosredhat-4x/

    I only needed a subset of his instructions which was to go into the source and:

    cd ruby-1.9.2-p136/ext/zlib/
ruby extconf.rb --with-zlib-include=/usr/include --width-zlib-lib=/usr/lib
gem install rails --include-dependencies

    That’s it! Thanks to Lucas;)

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