环境：

Ubuntu 13.10
bitnami-redmine-2.5.1-1-linux-x64-installer.run

用bitnami安装完redmine以后，有是否忘记了用户名和密码。但是又没有配置邮件服务器，无法找回密码。

只能去服务器更改了。更改步骤如下：

1. 修改 安装目录/redmin/apps/redmine/htdocs/config/database.yml，更对对应的用户名，密码，数据库地址，端口号

production:
  adapter: mysql2
  database: bitnami_redmine
  host: 127.0.0.1
  username: root
  password: ""
  port: 3307
  encoding: utf8
  socket: /home/hyadmin/redmin/mysql/tmp/mysql.sock
development:
  adapter: mysql2
  database: redmine_development
  host: localhost
  username: root
  password: ""
  encoding: utf8
# Warning: The database defined as "test" will be erased and
# re-generated from your development database when you run "rake".
# Do not set this db to the same as development or production.
test:
  adapter: mysql2
  database: redmine_test
  host: localhost
  username: root
  password: ""
  encoding: utf8

cd 安装目录/redmin/apps/redmine/htdocs/script

3. 执行如下命令，进入ruby

./rails console production

4. 取得你要修改的用户对象(ruby>代表进入ruby环境）

   ruby> admin_user = User.find_by_login(‘你要改的用户名‘)

5.修改admin用户对象密码

  ruby> admin_user.password = ‘你的密码‘

  注: 这个密码不能太短，否则报错。

6.保存admin用户对象信息

  ruby> admin_user.save!

7.退出ruby环境

  ruby> quit

这样应该就可以用yourpassword这个新密码登录系统了