Rvm安装ruby

• https://www.runoob.com/ruby/ruby-installation-unix.html
• 离线安装

• https://blog.csdn.net/bajiudongfeng/article/details/48676941

rvm  implode

sudo rm -rf .rvm .rvmrc   /etc/rvmrc ;

最后不要忘记了注释 .bashrc 或者  .bash_profile 或者 .profile 中的相关语句

#[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm" # Load RVM function

gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
$ curl -sSL https://get.rvm.io | bash -s stable
# 如果上面的连接失败，可以尝试:
$ curl -L https://raw.githubusercontent.com/wayneeseguin/rvm/master/binscripts/rvm-installer | bash -s stable

cd ~
mkdir install && cd install
curl -sSL https://github.com/rvm/rvm/tarball/stable -o rvm-stable.tar.gz
mkdir rvm && cd rvm
tar --strip-components=1 -xzf ../rvm-stable.tar.gz
./install --auto-dotfiles
rvm -v

yum -y install witch

然后，载入 RVM 环境（新开 Termal 就不用这么做了，会自动重新载入的）

source ~/.rvm/scripts/rvm

or

source /usr/local/rvm/scripts/rvm

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

rvm -v

rvm install 2.4.0
ruby -v
gem -v

rvm list
rvm use 2.4.0 --default

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