折腾rails3
///////////gem install 报错或是太慢,gem install 本地安装/////////////////////////
或是gem install 太慢 或是无法联接 timeout
这时可以通过本地安装的方式安装gem
首先进入gem官网http://rubygems.org/
然后搜索找到你要安装的gem，下载下来
应该是像rails-3.0.gem的文件
然后执行gem install -l rails-3.0.gem
-l参数意思是直接执行从本地安装
如果该gem没有依赖包，则直接就安装成功了
如果有依赖包，则会抱错提示缺少依赖的gem
然后只要再去下载该包，gem install -l xxx.gem
按照这个步骤安装虽然操作不方便，但是非常快。
如果要新装一台机器的话，只需把所有依赖包放到一个文件夹里，依次安装所有包，那会非常节省时间的，而且不一定需要联网的。
/////////////////////////安装不了rails3////////////////////////////
当出现以上错误时，有几种原因，网速过慢、gem服务器太慢、被墙了。 解决方案有几种，一种是自己一个一个下载gem包，本地安装，不过太麻烦。 另一种是修改源地址： 先查看一下当前源地址
gem env gem sources list
一般默认是：http://rubygems.org/ 增加几个源路径：
sudo gem sources -a http://gems.rubyforge.org sudo gem sources -a http://gems.github.com
问题应该解决了。关于gem sources的用法可以看帮助:gem help sources
//////////////////////////////////////加速gem///////////////////
下载gem-fast， 来加速你的Gem安装！（还有附赠下载进度条显示噢）
terminal中输入： gem install gem-fast
如果遇到问题， 想回退到之前的下载模式， 只需：gem uninstall gem-fast即可
一切如你所愿！
项目地址： http://github.com/dazuiba/gem-fast
Bug Track: http://github.com/dazuiba/gem-fast/issues
- jhjguxin@jhjguxin-Aspire-4750:~$ sudo apt-get install curl
- Reading package lists… Done
- Building dependency tree
- Reading state information… Done
- The following NEW packages will be installed:
- curl
- 0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.
- Need to get 134 kB of archives.
- After this operation, 389 kB of additional disk space will be used.
- Get:1 http://mirrors.sohu.com/ubuntu/ oneiric/main curl i386 7.21.6-3ubuntu3 [134 kB]
- Fetched 134 kB in 1s (132 kB/s)
- Selecting previously deselected package curl.
- (Reading database … 182147 files and directories currently installed.)
- Unpacking curl (from …/curl_7.21.6-3ubuntu3_i386.deb) …
- Processing triggers for man-db …
- Setting up curl (7.21.6-3ubuntu3) …
- j
- jhjguxin@jhjguxin-Aspire-4750:~$ sudo gem install gem-fast
- Fetching: gem-fast-0.0.6.3.gem (100%)
- ========================================================================
- Thanks for installing Gem-Fast!
- Gem-Fast will use curl to make your gem install faster!
- Try it now use: gem install rails
- ========================================================================
- Successfully installed gem-fast-0.0.6.3
- 1 gem installed
- Installing ri documentation for gem-fast-0.0.6.3…
- Installing RDoc documentation for gem-fast-0.0.6.3…
- jhjguxin@jhjguxin-Aspire-4750:~$ sudo gem install rails
- Downloading http://rubygems.org/latest_specs.4.8.gz
- ############################## 42.2%
///////////结果呢 各种爬墙 各种 折腾都没能在线安装好 rails3 最后实在不行 本地安装咯 31个gem包//////////////////////
我的ubuntu11.10 在http://rubygems.org/ 上面下载了如下的包（放在一个文件中），实际上还是根据实际的依赖提示来
actionmailer-3.1.1.gem i18n-0.6.0.gem rails-3.1.1.gem actionpack-3.1.1.gem json-1.6.1.gem railties-3.1.1.gem activemodel-3.1.1.gem mail-2.3.0.gem rake-0.9.2.2.gem activerecord-3.1.1.gem mime-types-1.17.2.gem rdoc-3.11.gem activeresource-3.1.1.gem multi_json-1.0.3.gem sprockets-2.0.3.gem activesupport-3.1.1.gem polyglot-0.3.3.gem thor-0.14.6.gem arel-2.2.1.gem rack-1.3.5.gem tilt-1.3.3.gem builder-3.0.0.gem rack-cache-1.1.gem treetop-1.4.10.gem bundler-1.0.21.gem rack-mount-0.8.3.gem tzinfo-0.3.30.gem erubis-2.7.0.gem rack-ssl-1.3.2.gem hike-1.2.1.gem rack-test-0.6.1.gem
然后：：：
jhjguxin@jhjguxin-virtual-machine:~/Downloads/rails$ sudo gem install rails-3.1.1.gem Building native extensions. This could take a while… Depending on your version of ruby, you may need to install ruby rdoc/ri data:
<= 1.8.6 : unsupported = 1.8.7 : gem install rdoc-data; rdoc-data —install = 1.9.1 : gem install rdoc-data; rdoc-data —install >= 1.9.2 : nothing to do! Yay! Successfully installed multi_json-1.0.3 Successfully installed activesupport-3.1.1 Successfully installed builder-3.0.0 Successfully installed i18n-0.6.0 Successfully installed activemodel-3.1.1 Successfully installed rack-1.3.5 Successfully installed rack-cache-1.1 Successfully installed rack-test-0.6.1 Successfully installed rack-mount-0.8.3 Successfully installed hike-1.2.1 Successfully installed tilt-1.3.3 Successfully installed sprockets-2.0.3 Successfully installed erubis-2.7.0 Successfully installed actionpack-3.1.1 Successfully installed arel-2.2.1 Successfully installed tzinfo-0.3.30 Successfully installed activerecord-3.1.1 Successfully installed activeresource-3.1.1 Successfully installed mime-types-1.17.2 Successfully installed polyglot-0.3.3 Successfully installed treetop-1.4.10 Successfully installed mail-2.3.0 Successfully installed actionmailer-3.1.1 Successfully installed rake-0.9.2.2 Successfully installed thor-0.14.6 Successfully installed rack-ssl-1.3.2 Successfully installed json-1.6.1 Successfully installed rdoc-3.11 Successfully installed railties-3.1.1 Successfully installed bundler-1.0.21 Successfully installed rails-3.1.1 31 gems installed Installing ri documentation for multi_json-1.0.3… Installing ri documentation for activesupport-3.1.1… Installing ri documentation for builder-3.0.0… Installing ri documentation for i18n-0.6.0… Installing ri documentation for activemodel-3.1.1… Installing ri documentation for rack-1.3.5… Installing ri documentation for rack-cache-1.1… Installing ri documentation for rack-test-0.6.1… Installing ri documentation for rack-mount-0.8.3… Installing ri documentation for hike-1.2.1… Installing ri documentation for tilt-1.3.3… Installing ri documentation for sprockets-2.0.3… Installing ri documentation for erubis-2.7.0… Installing ri documentation for actionpack-3.1.1… Installing ri documentation for arel-2.2.1… Installing ri documentation for tzinfo-0.3.30… Installing ri documentation for activerecord-3.1.1… Installing ri documentation for activeresource-3.1.1… Installing ri documentation for mime-types-1.17.2… Installing ri documentation for polyglot-0.3.3… Installing ri documentation for treetop-1.4.10… Installing ri documentation for mail-2.3.0… Installing ri documentation for actionmailer-3.1.1… Installing ri documentation for rake-0.9.2.2… Installing ri documentation for thor-0.14.6… Installing ri documentation for rack-ssl-1.3.2… Installing ri documentation for json-1.6.1… Installing ri documentation for rdoc-3.11… Installing ri documentation for railties-3.1.1… Installing ri documentation for bundler-1.0.21… Installing ri documentation for rails-3.1.1… Installing RDoc documentation for multi_json-1.0.3… Installing RDoc documentation for activesupport-3.1.1… Installing RDoc documentation for builder-3.0.0… Installing RDoc documentation for i18n-0.6.0… Installing RDoc documentation for activemodel-3.1.1… Installing RDoc documentation for rack-1.3.5… Installing RDoc documentation for rack-cache-1.1… Installing RDoc documentation for rack-test-0.6.1… Installing RDoc documentation for rack-mount-0.8.3… Installing RDoc documentation for hike-1.2.1… Installing RDoc documentation for tilt-1.3.3… Installing RDoc documentation for sprockets-2.0.3… Installing RDoc documentation for erubis-2.7.0… Installing RDoc documentation for actionpack-3.1.1… Installing RDoc documentation for arel-2.2.1… Installing RDoc documentation for tzinfo-0.3.30… Installing RDoc documentation for activerecord-3.1.1… Installing RDoc documentation for activeresource-3.1.1… Installing RDoc documentation for mime-types-1.17.2… Installing RDoc documentation for polyglot-0.3.3… Installing RDoc documentation for treetop-1.4.10… Installing RDoc documentation for mail-2.3.0… Installing RDoc documentation for actionmailer-3.1.1… Installing RDoc documentation for rake-0.9.2.2… Installing RDoc documentation for thor-0.14.6… Installing RDoc documentation for rack-ssl-1.3.2… Installing RDoc documentation for json-1.6.1… Installing RDoc documentation for rdoc-3.11… Installing RDoc documentation for railties-3.1.1… Installing RDoc documentation for bundler-1.0.21… Installing RDoc documentation for rails-3.1.1… jhjguxin@jhjguxin-virtual-machine:~/Downloads/rails$ rails -v Rails 3.1.1