linux 安装redmine 遇到的问题

1、编译安装ruby-2.3.1时

　　需要先安装libyaml、libyaml-devel

2、 安装gem install rake

　　　　ERROR: Loading command: install (LoadError)
　　　　cannot load such file -- zlib
　　　　ERROR: While executing gem ... (NoMethodError)
　　　　undefined method `invoke_with_build_args' for nil:NilClass

安装zlib-devel后，进入ruby源码文件夹 
　　安装ruby自身提供的zlib包 
　　#cd ext/zlib
　　#ruby ./extconf.rb
　　#make
　　#make install

　　ERROR: While executing gem ... (Gem::Exception)

　　Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources

　　　　yum -y install openssl-devel

　　 　 yum -y install openssl

　　　　将ruby 源码目录下的include 目录软链接到 / 目录下：

　　　　ln -s /...../ruby-2.2.3/include  /

　　　　编译安装：make && make install

2、gem install rmagick 出错时

　　yum install ImageMagick-devel

3、Gem::LoadError: Specified 'mysql' for database adapter, but the gem is not loaded. Add `gem 'mysql'` to your Gemfile (and ensure its version is at the minimum required by ActiveRecord).

　　在Gemfile  添加  gem "mysql"  然后执行 bundle install

4、LoadError: libmysqlclient.so.18: cannot open shared object file: No such file or directory

　　解决方案   /alidata/server/mysql-5.6.21/lib 写入  /etc/ld.so.conf 然后运行ldconfig重建/etc/ld.so.cache

5、ActionView::Template::Error (incompatible character encodings: UTF-8 and ASCII-8BIT)

　　解决方案：config/database.yml  下的 adpter修改mysql2