[root@ibm-x3650m4-02-vm-05 project]# rails generate controller pages
/opt/rh/rh-ror42/root/usr/share/gems/gems/execjs-2.2.0/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
        from /opt/rh/rh-ror42/root/usr/share/gems/gems/execjs-2.2.0/lib/execjs.rb:5:in `<module:ExecJS>'
        from /opt/rh/rh-ror42/root/usr/share/gems/gems/execjs-2.2.0/lib/execjs.rb:4:in `<top (required)>'
        from /opt/rh/rh-ror42/root/usr/share/gems/gems/uglifier-2.4.0/lib/uglifier.rb:3:in `require'
        from /opt/rh/rh-ror42/root/usr/share/gems/gems/uglifier-2.4.0/lib/uglifier.rb:3:in `<top (required)>'
        from /opt/rh/rh-ruby23/root/usr/share/gems/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `require'
        from /opt/rh/rh-ruby23/root/usr/share/gems/gems/bundler-1.10.6/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
        from /opt/rh/rh-ruby23/root/usr/share/gems/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `each'
        from /opt/rh/rh-ruby23/root/usr/share/gems/gems/bundler-1.10.6/lib/bundler/runtime.rb:72:in `block in require'
        from /opt/rh/rh-ruby23/root/usr/share/gems/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `each'
        from /opt/rh/rh-ruby23/root/usr/share/gems/gems/bundler-1.10.6/lib/bundler/runtime.rb:61:in `require'
        from /opt/rh/rh-ruby23/root/usr/share/gems/gems/bundler-1.10.6/lib/bundler.rb:134:in `require'
        from /root/project/config/application.rb:7:in `<top (required)>'
        from /opt/rh/rh-ror42/root/usr/share/gems/gems/spring-1.4.0/lib/spring/application.rb:82:in `require'
        from /opt/rh/rh-ror42/root/usr/share/gems/gems/spring-1.4.0/lib/spring/application.rb:82:in `preload'
        from /opt/rh/rh-ror42/root/usr/share/gems/gems/spring-1.4.0/lib/spring/application.rb:143:in `serve'
        from /opt/rh/rh-ror42/root/usr/share/gems/gems/spring-1.4.0/lib/spring/application.rb:131:in `block in run'
        from /opt/rh/rh-ror42/root/usr/share/gems/gems/spring-1.4.0/lib/spring/application.rb:125:in `loop'
        from /opt/rh/rh-ror42/root/usr/share/gems/gems/spring-1.4.0/lib/spring/application.rb:125:in `run'
        from /opt/rh/rh-ror42/root/usr/share/gems/gems/spring-1.4.0/lib/spring/application/boot.rb:18:in `<top (required)>'
        from /opt/rh/rh-ruby23/root/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'
        from /opt/rh/rh-ruby23/root/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:55:in `require'
        from -e:1:in `<main>'

Looks like a dependency is missing.


The same error when I attempt to start the server.

Followed: https://www.softwarecollections.org/en/scls/rhscl/rh-ror42/

Instructions
You can get started in three easy steps:

# 1. Install a package with repository for your system:
# On CentOS, install package centos-release-scl available in CentOS repository:
$ sudo yum install centos-release-scl

# On RHEL, enable RHSCL repository for you system:
$ sudo yum-config-manager --enable rhel-server-rhscl-7-rpms

# 2. Install the collection:
$ sudo yum install rh-ror42

# 3. Start using software collections:
$ scl enable rh-ror42 bash
At this point you should be able to use rails just as a normal application. Examples of commands run might be:

$ rails new project
$ cd project
$ rails server -p 8080
$ rails generate controller pages