Redhat7.6下安装Ruby on Rails环境

一、前置准备

• 操作系统说明

Red Hat Enterprise Linux (RHEL) 7.6 带GUI安装（勾选开发工具），配置好网络

• 下载与配置yum源相关安装包

下载：

wget http://mirrors.163.com/centos-vault/7.6.1810/os/x86_64/Packages/rpm-4.11.3-35.el7.x86_64.rpm

wget http://mirrors.163.com/centos-vault/7.6.1810/os/x86_64/Packages/python-urllib3-1.10.2-5.el7.noarch.rpm

wget http://mirrors.163.com/centos-vault/7.6.1810/os/x86_64/Packages/yum-3.4.3-161.el7.centos.noarch.rpm

wget http://mirrors.163.com/centos-vault/7.6.1810/os/x86_64/Packages/yum-metadata-parser-1.1.4-10.el7.x86_64.rpm

wget http://mirrors.163.com/centos-vault/7.6.1810/os/x86_64/Packages/yum-rhn-plugin-2.0.1-10.el7.noarch.rpm

wget http://mirrors.163.com/centos-vault/7.6.1810/os/x86_64/Packages/yum-plugin-fastestmirror-1.1.31-50.el7.noarch.rpm

安装：

sudo rpm -ivh --force rpm-4.11.3-35.el7.x86_64.rpm python-urllib3-1.10.2-5.el7.noarch.rpm yum-3.4.3-161.el7.centos.noarch.rpm yum-metadata-parser-1.1.4-10.el7.x86_64.rpm yum-rhn-plugin-2.0.1-10.el7.noarch.rpm yum-plugin-fastestmirror-1.1.31-50.el7.noarch.rpm

配置：

切换至 /etc/yum.repos.d/ 文件夹下，编辑redhat.repo文件，命令如下：

sudo vim redhat.repo

将如下内容拷贝粘贴并保存：

[base]

name=CentOS-$releasever - Base - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/7/os/$basearch/

        http://mirrors.aliyuncs.com/centos/7/os/$basearch/

        http://mirrors.cloud.aliyuncs.com/centos/7/os/$basearch/

gpgcheck=1

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#released updates

[updates]

name=CentOS-$releasever - Updates - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/7/updates/$basearch/

        http://mirrors.aliyuncs.com/centos/7/updates/$basearch/

        http://mirrors.cloud.aliyuncs.com/centos/7/updates/$basearch/

gpgcheck=1

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that may be useful

[extras]

name=CentOS-$releasever - Extras - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/7/extras/$basearch/

        http://mirrors.aliyuncs.com/centos/7/extras/$basearch/

        http://mirrors.cloud.aliyuncs.com/centos/7/extras/$basearch/

gpgcheck=1

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#additional packages that extend functionality of existing packages

[centosplus]

name=CentOS-$releasever - Plus - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/7/centosplus/$basearch/

        http://mirrors.aliyuncs.com/centos/7/centosplus/$basearch/

        http://mirrors.cloud.aliyuncs.com/centos/7/centosplus/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

#contrib - packages by Centos Users

[contrib]

name=CentOS-$releasever - Contrib - mirrors.aliyun.com

failovermethod=priority

baseurl=http://mirrors.aliyun.com/centos/7/contrib/$basearch/

        http://mirrors.aliyuncs.com/centos/7/contrib/$basearch/

        http://mirrors.cloud.aliyuncs.com/centos/7/contrib/$basearch/

gpgcheck=1

enabled=0

gpgkey=http://mirrors.aliyun.com/centos/RPM-GPG-KEY-CentOS-7

• 清除缓存并更新

yum clean all
yum makecache

• 关闭订阅注册

sudo vim /etc/yum/pluginconf.d/subscription-manager.conf

将enabled的值改为0

• 更新yum源

sudo yum update -y

二、安装rails环境

这里使用第三方工具RVM来安装ruby和rails

进入rvm官网（http://rvm.io）

• 安装GPG keys（上图第一步）

示例（仅为示例，实际安装请登录rvm官网复制安装最新的key）：

在终端执行命令：

gpg2 --keyserver keyserver.ubuntu.com --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB

• 安装ruby和rails（上图第二步）

示例：

在终端执行命令：

sudo curl -sSL https://get.rvm.io | bash -s stable --rails

安装完后，执行命令：source /usr/local/rvm/scripts/rvm

然后可以通过 rails-v 命令查看版本信息

三、升级ruby版本

切换到root账号，使用rvm方式升级

• 升级版本

执行命令：rvm install 版本号

示例：

rvm install 3.1.0

• 切换版本

执行命令：rvm use 版本号 --default

示例：

rvm use 3.1.0 --default

• 查看版本

ruby -v