Ruby 安装 Linux

The following lists the steps to install Ruby on a Linux machine.

Note:Before installation, please make sure you have root privileges.

Source code installation

• Download the latest version of the Ruby compressed file.Please click here to download.

• After downloading Ruby, unzip it into the newly created directory:

$ tar　-xvzf ruby-2.2.3.tgz　　　　
$ cd ruby-2.2.3

• Now, configure and compile the source code as shown below:

$ ./configure
$ make
$ sudo make install

• After installation, enter the following command in the command line to ensure everything is working properly:

$ruby　-v
ruby　2.2.3……

• If everything works as expected, it will output the version of the installed Ruby interpreter, as shown above. If you have installed another version, it will display a different version.

Automatic Ruby Installation

If your computer is connected to the Internet, the simplest way to install Ruby is to use yum or apt-get. Enter the following command in the command prompt to install Ruby on your computer.

$ sudo yum install ruby # CentOS, Fedora, or RHEL system
or
sudo apt-get install ruby-full # Debian or Ubuntu system

If you are using an Apple system, you can use brew Command installation:

$ brew install ruby

Install Ruby using RVM

RVM can install and manage multiple Ruby versions in the system. It can also manage different gem sets. It supports OS X, Linux, and other UNIX-like operating systems.

Install RVM

$ gpg　--keyserver hkp://keys.gnupg.net　--recv-keys　409B6B1796C275462A1703113804BB82D39DC0E3　7D2BAF1CF37B13E2069D6956105BD0E739499BDB
$ curl　-sSL https://get.rvm.io | bash　-s stable

After installation, some installation information will be listed, one line of which is worth noting:

...
To start using RVM, you need to run `source　/etc/profile.d/rvm.sh`
....

This means that to start using it, you need to run a source command to re-execute the recently modified initialization file. According to the installation prompts, execute the following command to load the RVM environment (you don't need to do this when opening a new Termal, as it will automatically reload it)

source　/etc/profile.d/rvm.sh

Check if it is installed correctly

$ rvm　-v
rvm　1.22.17　(stable) by Wayne E. Seguin <[email protected]>, Michal Papis <[email protected]> [https://rvm.io/]

Install Ruby Environment with RVM

List known ruby versions:

$ rvm list known

You can choose an existing RVM version to install (the following takes rvm as an example) 2.4.2 take the installation of a version as an example)

$ rvm install　2.4.2

Similarly, continue to wait for the long download and compilation process. After completion, Ruby and Ruby Gems are installed.

rvm Common Commands

Query already installed ruby

$ rvm list

Uninstall an installed version

$ rvm remove　1.9.2

Set Ruby Version

After RVM is installed, you need to run the following command to set the specified version of Ruby as the system default version

$ rvm　2.0.0　--default

Similarly, you can also use other version numbers, provided that you have installed that version using rvm install

At this point, you can test whether it is correct

$ ruby　-v
ruby　2.0.0p247　(2013-06-27　revision　41674) [x86_64-darwin13.0.0]
$ gem　-v
2.1.6

This may be because the default source of Ruby uses cocoapods.org, and accessing this website from within China sometimes has issues. One solution on the internet is to replace it with ruby-china's, the replacement method is as follows:

$　gem　source　-r https://rubygems.org/
$　gem　source　-a　https://gems.ruby-china.com/

要想验证是否替换成功了，可以执行：

$　gem　sources　-l

正常的输出结果：

***　CURRENT　SOURCES　***
https://gems.ruby-china.com/

请确保只有 gems.ruby-china.com

$　gem　install　rails

如果你使用 Gemfile 和 Bundle (例如：Rails 项目)

你可以用 Bundler 的 Gem 源代码镜像命令。

$　bundle　config　mirror.https://rubygems.org　https://gems.ruby-china.com

这样你不用改你的 Gemfile 的 source。

source　'https://rubygems.org/'
gem　'rails',　'4.1.0'
...