在Ubuntu 16.04 LTS上安装redmine 3.4.

在Ubuntu 16.04 LTS上安装redmine 3.2.0
Ubuntu安装redmine详细过程

1.安装依赖库

apt-get install libssl-dev libssl1.0.0 libaio-dev libaio1 libmagickcore-dev libmagickwand-dev imagemagick libcurl4-openssl-dev

2.安装Ruby

cd /usr/local
wget https://cache.ruby-lang.org/pub/ruby/2.3/ruby-2.3.0.tar.gz
tar -zxvf ruby-2.3.0.tar.gz
cd ruby-2.3.0
./configure
make
make install

3.修改gem源

gem source -r https://rubygems.org/
gem source -a https://gems.ruby-china.com
gem update  

注意： 原来的https://ruby.taobao.org已经不再维护，官网说交由https://gems.ruby-china.org维护，https://gems.ruby-china.org官网说镜像地址已经改为https://gems.ruby-china.com，只能说有点坑。

4.安装bundler

gem install bundler -v=1.17.0 #不加版本号安装的是最新的2.x.x，但是因为redmine使用的比较早的版本，必须指定版本，否则后续无法进行 rails这里不安装，后续会通过Gemfile一并其他的一起安装。

5.安装MySQL

mysql安装有多种方式，这里直接使用apt来安装：

sudo apt-get install mysql-server mysql-client libmysqlclient-dev

启动mysql服务

service mysqld start

登录mysql

mysql -u root -p

这里如果不知道初始密码可以百度一下忘记mysql密码，这里就不再细说了。

6.创建redmine数据库

登录mysql

CREATE DATABASE redmine CHARACTER SET utf8;
GRANT ALL PRIVILEGES ON redmine.* TO 'redmine'@'%' IDENTIFIED BY '123456';
FLUSH PRIVILEGES;

7.安装Redmine

cd /usr/local
wget https://github.com/redmine/redmine/archive/3.4.10.tar.gz
mkdir redmine-3.4.10
tar -zxvf 3.4.10.tar.gz redmine-3.4.10
cd /usr/local/redmine-3.4.10

为redmine配置数据库连接：

cp config/database.yml.example config/database.yml

修改database.yml中“production”小结内容如下：

production:
  adapter: mysql2
  database: redmine
  host: localhost
  username: redmine
  password: 123456
  encoding: utf8

编辑redmine的Gemfile：
修改source为https://gems.ruby-china.com
在“gem rbpdf”一行下面添加：

gem "rbpdf-font", "~> 1.19.0"

执行以下命令

bundle install --without development test
rake generate_secret_token 
RAILS_ENV=production bundle exec rake db:migrate #创建表
RAILS_ENV=production bundle exec rake redmine:load_default_data #选择语言区域
mkdir -p tmp tmp/pdf public/plugin_assets

配置附件存放目录
cp config/configuration.yml.example config/configuration.yml

修改config/configuration.yml内容如下：

# = Redmine configuration file
#
# Each environment has it's own configuration options.  If you are only
# running in production, only the production block needs to be configured.
# Environment specific configuration options override the default ones.
#
# Note that this file needs to be a valid YAML file.
# DO NOT USE TABS! Use 2 spaces instead of tabs for identation.

# default configuration options for all environments
default:
  # Outgoing emails configuration
  # See the examples below and the Rails guide for more configuration options:
  # http://guides.rubyonrails.org/action_mailer_basics.html#action-mailer-configuration
  # email_delivery:

  attachments_storage_path: /opt/redmine/files

# specific configuration options for production environment
# that overrides the default ones
production:

# specific configuration options for development environment
# that overrides the default ones
development:

其实主要是配置attachments_storage_path，其他可以看需要自行配置。
启动Ruby服务器：

ruby bin/rails server webrick -e production

本机可以通过浏览器打开http://127.0.0.1:3000
如果要在其他机器上访问的话

ruby bin/rails server webrick -e production -b 0.0.0.0 -p 8080