RVM用中国镜像安装

RVM

RVM 是一个命令行工具，可以提供一个便捷的多版本 Ruby 环境的管理和切换。

https://rvm.io/

如果你打算学习 Ruby / Rails, RVM 是必不可少的工具之一。

RVM 安装

$ gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
$ \curl -sSL https://get.rvm.io | bash -s stable
$ source ~/.bashrc
$ source ~/.bash_profile

修改 RVM 的 Ruby 安装源到 Ruby China 的 Ruby 镜像服务器，这样能提高安装速度

echo "ruby_url=https://cache.ruby-china.com/pub/ruby" > /usr/local/rvm/user/db

列出已知的 Ruby 版本

#rvm list known
# MRI Rubies
[ruby-]1.8.6[-p420]
[ruby-]1.8.7[-head] # security released on head
[ruby-]1.9.1[-p431]
[ruby-]1.9.2[-p330]
[ruby-]1.9.3[-p551]
[ruby-]2.0.0[-p648]
[ruby-]2.1[.10]
[ruby-]2.2[.10]
[ruby-]2.3[.8]
[ruby-]2.4[.6]
[ruby-]2.5[.5]
[ruby-]2.6[.3]
[ruby-]2.7[.0-preview1]
ruby-head

# for forks use: rvm install ruby-head-<name> --url https://github.com/github/ruby.git --branch 2.2

# JRuby
jruby-1.6[.8]
jruby-1.7[.27]
jruby-9.1[.17.0]
jruby[-9.2.7.0]
jruby-head

# Rubinius
rbx-1[.4.3]
rbx-2.3[.0]
rbx-2.4[.1]
rbx-2[.5.8]
rbx-3[.107]
rbx-4[.3]
rbx-head

# TruffleRuby
truffleruby[-19.1.0]

# Opal
opal

# Minimalistic ruby implementation - ISO 30170:2012
mruby-1.0.0
mruby-1.1.0
mruby-1.2.0
mruby-1.3.0
mruby-1[.4.1]
mruby-2[.0.1]
mruby[-head]

# Ruby Enterprise Edition
ree-1.8.6
ree[-1.8.7][-2012.02]

# Topaz
topaz

# MagLev
maglev-1.0.0
maglev-1.1[RC1]
maglev[-1.2Alpha4]
maglev-head

# Mac OS X Snow Leopard Or Newer
macruby-0.10
macruby-0.11
macruby[-0.12]
macruby-nightly
macruby-head

# IronRuby
ironruby[-1.1.3]
ironruby-head

安装一个 Ruby 版本

#rvm install 2.6.3
Searching for binary rubies, this might take some time.
No binary rubies available for: centos/7/x86_64/ruby-2.6.3.
Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies.
Checking requirements for centos.
Requirements installation successful.
Installing Ruby from source to: /usr/local/rvm/rubies/ruby-2.6.3, this may take a while depending on your cpu(s)...
ruby-2.6.3 - #downloading ruby-2.6.3, this may take a while depending on your connection...
** Resuming transfer from byte position 4009984
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100 10.0M  100 10.0M    0     0  8270k      0  0:00:01  0:00:01 --:--:-- 8275k
ruby-2.6.3 - #extracting ruby-2.6.3 to /usr/local/rvm/src/ruby-2.6.3.....
ruby-2.6.3 - #configuring......................................................................
ruby-2.6.3 - #post-configuration..
ruby-2.6.3 - #compiling.............................................................................................
ruby-2.6.3 - #installing................................
ruby-2.6.3 - #making binaries executable..
ruby-2.6.3 - #downloading rubygems-3.0.6
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  866k  100  866k    0     0   5355      0  0:02:45  0:02:45 --:--:-- 10029
No checksum for downloaded archive, recording checksum in user configuration.
ruby-2.6.3 - #extracting rubygems-3.0.6.....
ruby-2.6.3 - #removing old rubygems........
ruby-2.6.3 - #installing rubygems-3.0.6...............................................
ruby-2.6.3 - #gemset created /usr/local/rvm/gems/ruby-2.6.3@global
ruby-2.6.3 - #importing gemset /usr/local/rvm/gemsets/global.gems................................................................
ruby-2.6.3 - #generating global wrappers.......
ruby-2.6.3 - #gemset created /usr/local/rvm/gems/ruby-2.6.3
ruby-2.6.3 - #importing gemsetfile /usr/local/rvm/gemsets/default.gems evaluated to empty gem list
ruby-2.6.3 - #generating default wrappers.......
ruby-2.6.3 - #adjusting #shebangs for (gem irb erb ri rdoc testrb rake).
Install of ruby-2.6.3 - #complete 
Ruby was built without documentation, to build it run: rvm docs generate-ri

查看安装的ruby

#rvm list
=* ruby-2.6.3 [ x86_64 ]

# => - current
# =* - current && default
#  * - default