[CentOS] gem install reel on Centos 7

Mon Aug 5 12:00:58 UTC 2019
Jerry Geis <jerry.geis at gmail.com>

Thanks John for the info... I did that and now I'm missing a file.
I tried to ask yum what package I need - but It did not know.

Building native extensions.  This could take a while...
ERROR: Failed to build gem native extension.

    /opt/rh/rh-ruby22/root/usr/bin/ruby -r
./siteconf20190805-94063-1gebs0u.rb extconf.rb
mkmf.rb can't find header files for ruby at

extconf failed, exit code 1

Gem files will remain installed in
/opt/rh/rh-ruby22/root/usr/local/share/gems/gems/nio4r-1.1.1 for inspection.
Results logged to

yum provides /opt/rh/rh-ruby22/root/usr/share/include/ruby.h
Loaded plugins: fastestmirror, langpacks, nvidia
Loading mirror speeds from cached hostfile
 * base: mirror.tzulo.com
 * centos-sclo-rh: mirror.team-cymru.com
 * centos-sclo-sclo: mirror.fileplanet.com
 * elrepo: ord.mirror.rackspace.com
 * epel: ord.mirror.rackspace.com
 * extras: mirror.nodesdirect.com
 * updates: mirrors.liquidweb.com

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No matches found

Thanks, What is next ?