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Install Gollum wiki on CentOS 6.5

· by yulistic · Read in about 4 min · (769 Words)
centos gollum linux ruby rugged rvm wiki


I decided to use gollum wiki, because of following reasons.

  • Bitbucket wiki supports poor searching functionality.

  • Gollum gives us a nice view and a convenient navigating functionality.

  • Gollum is easy to install, and light-weight.

  • Gollum supports pure markdown language.

I tried to install gollum in two different system: Ubuntu 14.04 and CentOS 6.5. There was no special problem when installing in Ubuntu, but there were in CentOS.

Basic installation


rvm is Ruby Version Manager that is a ruby manager maintained by third party. Because yum in CentOS 6.5 supports only 1.8.x version ruby, we need another way to install higher version of ruby. Basically, you can follow the instructions mentioned on the rvm hompage.

  1. Get key.

    gpg –keyserver hkp:// –recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3

  2.  Install rvm.

    curl -sSL | bash -s stable

ruby (2.2.1)

ruby will be installed with RVM.

Check the ruby installation with command: gem.

# gem
RubyGems is a sophisticated package manager for Ruby.  This is a
basic help message containing pointers to more information.

    gem -h/--help
    gem -v/--version
    gem command [arguments...] [options...]

    gem install rake
    gem list --local
    gem build package.gemspec
    gem help install

  Further help:
    gem help commands            list all 'gem' commands
    gem help examples            show some examples of usage
    gem help platforms           show information about platforms
    gem help <COMMAND>           show help on COMMAND
                                   (e.g. 'gem help install')
    gem server                   present a web page at
                                 with info about installed gems
  Further information:


Install gollum. If you need to be root, use sudo.

[sudo] gem install gollum


If you already have a wiki in your github or bitbucket project, clone it into your local machine.

# git clone [your remote git repository address]

If not, make a new git project.

# mkdir proj
# cd proj
# git init

In root directory of your git project, just gollum.

# gollum

You can access to your wiki page through http://localhost:4567.

Problems & Solutions

Encoding issue

In my system, I couldn’t create a new page and edit some pages. When I tried to create one, it shows the following error message.

''' Encoding::CompatibilityError at /create incompatible character encodings: UTF-8 and ASCII-8BIT '''

[caption id=«attachment_290» align=«aligncenter» width=«1212»]create_error Cannot create a new page[/caption]

I was not familiar with ruby system, so I decided to workaround this issue. To workaround it, I used **rugged **adapter instead of grit which is default. (Git adapters in gollum)

Install rugged_adapter

For the installation of _ruggedadapter refer to _ruggedadapter github site.

Briefly, you can install rugged adapter with following command.

# gem install --pre gollum-rugged_adapter

Then, rugged adapter can be adopted by gollum with the following options.

# gollum --adapter rugged

But, it does not run because of the following mime-type error.

Mime-types issue in rugged adapter

After installing rugged adapter, gollum does not run because of the mime-types version mismatch problem. This issue has already been filed (link).

# gollum --adapter rugged
/home/yulistic/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/specification.rb:2112:in `raise_if_conflicts': Unable to activate gollum-rugged_adapter-0.4, because mime-types-1.25.1 conflicts with mime-types (~> 2.6) (Gem::ConflictError)
        from /home/yulistic/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/specification.rb:1280:in `activate'
        from /home/yulistic/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems.rb:198:in `rescue in try_activate'
        from /home/yulistic/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems.rb:195:in `try_activate'
        from /home/yulistic/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:126:in `rescue in require'
        from /home/yulistic/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:39:in `require'
        from /home/yulistic/.rvm/gems/ruby-2.2.1/gems/gollum-lib-4.1.0/lib/gollum-lib.rb:10:in `<top (required)>'
        from /home/yulistic/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        from /home/yulistic/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        from /home/yulistic/.rvm/gems/ruby-2.2.1/gems/gollum-4.0.0/lib/gollum/app.rb:4:in `<top (required)>'
        from /home/yulistic/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        from /home/yulistic/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
        from /home/yulistic/.rvm/gems/ruby-2.2.1/gems/gollum-4.0.0/bin/gollum:192:in `<top (required)>'
        from /home/yulistic/.rvm/gems/ruby-2.2.1/bin/gollum:23:in `load'
        from /home/yulistic/.rvm/gems/ruby-2.2.1/bin/gollum:23:in `<main>'
        from /home/yulistic/.rvm/gems/ruby-2.2.1/bin/ruby_executable_hooks:15:in `eval'
        from /home/yulistic/.rvm/gems/ruby-2.2.1/bin/ruby_executable_hooks:15:in `<main>'

As the issue has not been solved yet, I modified the gemspec file of grit. (Just release constraints of grit dependency, as I’m not going to use grit.)

Open the grit’s gemspec file and modify it. In my case, I installed ruby without root permission, so it was in my home directory.

# vim ~/.rvm/gems/ruby-2.2.1/specifications/gitlab-grit-2.7.3.gemspec

Modify the file like below.

 27     if >='1.2.0') then
 28       s.add_runtime_dependency(%q<charlock_holmes>, ["~> 0.6"])
 29       s.add_runtime_dependency(%q<posix-spawn>, ["~> 0.3"])
 30       # Modified by yulistic.
 31       # s.add_runtime_dependency(%q<mime-types>, ["~> 1.15"])
 32       s.add_runtime_dependency(%q<mime-types>, ["~> 2.6"])
 33       s.add_runtime_dependency(%q<diff-lcs>, ["~> 1.1"])
 34       s.add_development_dependency(%q<mocha>, [">= 0"])
 35     else

After modifying it, you can run gollum and update pages normally.

# gollum --adapter rugged

Other issues

git configuration ( &

When you try to update pages, it may requires git and_ user.email_ to be configured.

[caption id=«attachment_299» align=«aligncenter» width=«1207»]git config error ( git config error ([/caption]

In the case, just set the configuration as below.

# git config "yulistic"

You can check your current configuration.

# git config

As the same way, can be configured.

Add public key to Bitbucket

You don’t need to type in password every time pushing. Refer to link.

For key generation, refer to the post: [Linux] Login SSH without password input.


  • How to pull/push automatically when update locally?