1. Install RVM and refer to https://rvm.io/

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

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

创新互联公司是工信部颁发资质IDC服务器商，为用户提供优质的乐山服务器托管服务[jiaxiaol@usda5p-scop01-admtool ~]$ gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB gpg: directory `/home/jiaxiaol/.gnupg' created gpg: new configuration file `/home/jiaxiaol/.gnupg/gpg.conf' created gpg: WARNING: options in `/home/jiaxiaol/.gnupg/gpg.conf' are not yet active during this run gpg: keyring `/home/jiaxiaol/.gnupg/secring.gpg' created gpg: keyring `/home/jiaxiaol/.gnupg/pubring.gpg' created gpg: requesting key D39DC0E3 from hkp server keys.gnupg.net gpg: requesting key 39499BDB from hkp server keys.gnupg.net gpg: /home/jiaxiaol/.gnupg/trustdb.gpg: trustdb created gpg: key D39DC0E3: public key "Michal Papis (RVM signing) " imported gpg: key 39499BDB: public key "Piotr Kuczynski " imported gpg: no ultimately trusted keys found gpg: Total number processed: 2 gpg:               imported: 2  (RSA: 2) [jiaxiaol@usda5p-scop01-admtool ~]$ [jiaxiaol@usda5p-scop01-admtool ~]$ \curl -sSL https://get.rvm.io | bash -s stable Downloading https://github.com/rvm/rvm/archive/1.29.2.tar.gz Downloading https://github.com/rvm/rvm/releases/download/1.29.2/1.29.2.tar.gz.asc gpg: Signature made Thu 22 Jun 2017 04:18:38 PM GMT using RSA key ID BF04FF17 gpg: Good signature from "Michal Papis (RVM signing) " gpg:                 aka "Michal Papis " gpg:                 aka "[jpeg p_w_picpath of size 5015]" gpg: WARNING: This key is not certified with a trusted signature! gpg:          There is no indication that the signature belongs to the owner. Primary key fingerprint: 409B 6B17 96C2 7546 2A17  0311 3804 BB82 D39D C0E3      Subkey fingerprint: 62C9 E5F4 DA30 0D94 AC36  166B E206 C29F BF04 FF17 GPG verified '/home/jiaxiaol/.rvm/archives/rvm-1.29.2.tgz' Installing RVM to /home/jiaxiaol/.rvm/     Adding rvm PATH line to /home/jiaxiaol/.profile /home/jiaxiaol/.mkshrc /home/jiaxiaol/.bashrc /home/jiaxiaol/.zshrc.     Adding rvm loading line to /home/jiaxiaol/.profile /home/jiaxiaol/.bash_profile /home/jiaxiaol/.zlogin. Installation of RVM in /home/jiaxiaol/.rvm/ is almost complete:   * To start using RVM you need to run `source /home/jiaxiaol/.rvm/scripts/rvm`     in all your open shell windows, in rare cases you need to reopen all shell windows. # jiaxiaol, # #   Thank you for using RVM! #   We sincerely hope that RVM helps to make your life easier and more enjoyable!!! # # ~Wayne, Michal & team. In case of problems: https://rvm.io/help and https://twitter.com/rvm_io   * WARNING: You have '~/.profile' file, you might want to load it,     to do that add the following line to '/home/jiaxiaol/.bash_profile':       source ~/.profile

2. Check the available version

[jiaxiaol@usda5p-scop01-admtool ~]$ rvm list known

3. Install ruby 2.4.0:

[jiaxiaol@usda5p-scop01-admtool ~]$ rvm install 2.4.0 Searching for binary rubies, this might take some time. No binary rubies available for: centos/7/x86_64/ruby-2.4.0. Continuing with compilation. Please read 'rvm help mount' to get more information on binary rubies. Checking requirements for centos. Installing requirements for centos. Installing required packages: libyaml-devel, readline-devel, libffi-devel, sqlite-devel......... Requirements installation successful. Installing Ruby from source to: /home/jiaxiaol/.rvm/rubies/ruby-2.4.0, this may take a while depending on your cpu(s)... ruby-2.4.0 - #downloading ruby-2.4.0, this may take a while depending on your connection...   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current                                  Dload  Upload   Total   Spent    Left  Speed 100 11.9M  100 11.9M    0     0  6499k      0  0:00:01  0:00:01 --:--:-- 6499k ruby-2.4.0 - #extracting ruby-2.4.0 to /home/jiaxiaol/.rvm/src/ruby-2.4.0.... ruby-2.4.0 - #configuring.................................................................. ruby-2.4.0 - #post-configuration.. ruby-2.4.0 - #compiling................................................................................. ruby-2.4.0 - #installing........................... ruby-2.4.0 - #making binaries executable.. ruby-2.4.0 - #downloading rubygems-2.6.12   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current                                  Dload  Upload   Total   Spent    Left  Speed 100  749k  100  749k    0     0  2842k      0 --:--:-- --:--:-- --:--:-- 2851k No checksum for downloaded archive, recording checksum in user configuration. ruby-2.4.0 - #extracting rubygems-2.6.12.... ruby-2.4.0 - #removing old rubygems......... ruby-2.4.0 - #installing rubygems-2.6.12......................... ruby-2.4.0 - #gemset created /home/jiaxiaol/.rvm/gems/ruby-2.4.0@global ruby-2.4.0 - #importing gemset /home/jiaxiaol/.rvm/gemsets/global.gems............................................... ruby-2.4.0 - #generating global wrappers........ ruby-2.4.0 - #gemset created /home/jiaxiaol/.rvm/gems/ruby-2.4.0 ruby-2.4.0 - #importing gemsetfile /home/jiaxiaol/.rvm/gemsets/default.gems evaluated to empty gem list ruby-2.4.0 - #generating default wrappers........ ruby-2.4.0 - #adjusting #shebangs for (gem irb erb ri rdoc testrb rake). Install of ruby-2.4.0 - #complete Ruby was built without documentation, to build it run: rvm docs generate-ri [jiaxiaol@usda5p-scop01-admtool ~]$ [jiaxiaol@usda5p-scop01-admtool ~]$ rvm list rvm rubies =* ruby-2.4.0 [ x86_64 ] # => - current # =* - current && default #  * - default [jiaxiaol@usda5p-scop01-admtool ~]$

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