thin 無法啟動？Missing the Rails 2.3.5 gem？

Thin 是比 Mongrel 更快的Web服务器

安裝 thin 非常簡單

sudo gem install thin

啟動方式

到rails的應用目錄下，打入
thin start

但啟動後卻會出現錯誤訊息

Missing the Rails 2.3.5 gem. Please `gem install -v=2.3.5 rails`, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed.

解決方式：移除rack 1.1.0，保留rack 1.0.1

sudo gem uninstall rack

若沒有 rack 1.0.1，可自行安裝

sudo gem install rack -v 1.0.1

ubuntu 中文歌詞插件 for Rhythmbox

sogou-lyrics
鲁班歌词(RBLyrics)：Rhythmbox的歌词下载显示插件
(a plugin for rhythmbox to download and display lyrics)

下載點Downloads

这是什么(Introduction)

这是一个Rhythmbox的插件。这个插件能够下载Rhythmbox当前播放歌曲的歌词，并使 用多种方式显示。
This is a lyrics plugin for Rhythmbox. Lyrics is downloaded and displayed automatically.

屏幕截图(Screenshot)

original[1280 x 800] now[30.4%]

点击查看大图(click to enlarge)

功能特性(Feature)

1. 从多个歌词源下载歌词并保存到本地(download lyrics from various sources)
2. 自动载入本地歌词，自动检测文件编码(load local lyrics automatically)
3. 嵌入界面显示歌 词(display lyrics embedded in the interface)
4. 使用gnome-osd显示歌词(display lyrics using gnome-osd)
5. 滚动显示歌词，鼠标左键拖动可以移动窗口，中键拖动可以定位歌词，右键拖动可以改变窗口大小 (display lyrics in a auto scroll window, press left button and drag will move the window, press right button and drag will resize the window, press middle button and drag will locate lyrics in roller mode)
6. 使用系统默认编辑器打开歌词文件(open lyrics file using system default editor)
7. 未能精确查找歌词时，弹出歌词选择对话框 供用户选择(pop choose lyrics dialog while no accurate lyrics found)
8. 右键菜单中加入编辑歌词和手动下载歌词(edit lyrics and download lyrics manually in context menu)
9. 可通过插件管理器 配置插件功能(totally configurable through plugin manager)
10. 以上功能可能会随着项目进展有暂时改动(keep up with updates, discover yourself)

如何安装(Install)

下载最新的deb包安装,重启rhythmbox.你会在插件管理器中发现鲁班歌词.
Download latest deb package and install. RBlyrics will be listed in the plugin manager after restart rhythmbox.