Question

使用RVM安装ruby 2.4.0，但在输入ruby之后，该命令只是无限期冻结。可以ctrl-C'ed出来，但红宝石永远不会加载。

Ruby信息：

ruby-2.4.0:

  system:
    uname:        "Linux waffleboy 4.8.0-58-generic #63~16.04.1-Ubuntu SMP Mon Jun 26 18:08:51 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux"
    name:         "Ubuntu"
    version:      "16.04"
    architecture: "x86_64"
    bash:         "/bin/bash => GNU bash, version 4.3.48(1)-release (x86_64-pc-linux-gnu)"
    zsh:          "/usr/bin/zsh => zsh 5.1.1 (x86_64-ubuntu-linux-gnu)"
    remote path:  "ubuntu/16.04/x86_64"

  rvm:
    version:      "rvm 1.29.2 (latest) by Michal Papis, Piotr Kuczynski, Wayne E. Seguin [https://rvm.io/]"
    updated:      "23 minutes 20 seconds ago"
    path:         "/home/waffleboy/.rvm"
    autolibs:     "[4] Allow RVM to use package manager if found, install missing dependencies, install package manager (only OS X)."

  ruby:
    interpreter:  "ruby"
    version:      "2.4.0p0"
    date:         "2016-12-24"
    platform:     "x86_64-linux"
    patchlevel:   "2016-12-24 revision 57164"
    full_version: "ruby 2.4.0p0 (2016-12-24 revision 57164) [x86_64-linux]"

  homes:
    gem:          "/home/waffleboy/.rvm/gems/ruby-2.4.0"
    ruby:         "/home/waffleboy/.rvm/rubies/ruby-2.4.0"

  binaries:
    ruby:         "/home/waffleboy/.rvm/rubies/ruby-2.4.0/bin/ruby"
    irb:          "/home/waffleboy/.rvm/rubies/ruby-2.4.0/bin/irb"
    gem:          "/home/waffleboy/.rvm/rubies/ruby-2.4.0/bin/gem"
    rake:         "/home/waffleboy/.rvm/rubies/ruby-2.4.0/bin/rake"

  environment:
    PATH:         "/home/waffleboy/.rvm/gems/ruby-2.4.0/bin:/home/waffleboy/.rvm/gems/ruby-2.4.0@global/bin:/home/waffleboy/.rvm/rubies/ruby-2.4.0/bin:/storage/anaconda3/bin:/home/waffleboy/bin:/home/waffleboy/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin:/usr/bin:/storage/programfiles/:/home/waffleboy/bin:/storage/programfiles/spark-1.6.2/bin:/home/waffleboy/.rvm/bin"
    GEM_HOME:     "/home/waffleboy/.rvm/gems/ruby-2.4.0"
    GEM_PATH:     "/home/waffleboy/.rvm/gems/ruby-2.4.0:/home/waffleboy/.rvm/gems/ruby-2.4.0@global"
    MY_RUBY_HOME: "/home/waffleboy/.rvm/rubies/ruby-2.4.0"
    IRBRC:        "/home/waffleboy/.rvm/rubies/ruby-2.4.0/.irbrc"
    RUBYOPT:      ""
    gemset:       ""

Rvm列表：

rvm rubies

=* ruby-2.4.0 [ x86_64 ]

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

我尝试过多次重新安装和安装ruby，但它似乎无法正常工作。

有人能指出我正确的方向吗？ :)谢谢！

Answer 1

这是正常的;这是一个功能，而不是一个错误。

在没有任何参数的情况下运行ruby会导致程序运行并等待接收来自STDIN的输入（以EOF字符结尾）。在收到此信息之前，它不会执行任何操作。

如果您想以交互式模式运行ruby，（比如运行python时），请使用ruby的内置irb（＆＃ 34;交互式ruby＆＃34;）命令。

或者，如果您只想显示有关安装的ruby版本的一些基本信息，那么您可以尝试以下命令：

ruby -v # Display version information
ruby -h # Display help about usage, switches and features

Answer 2

如果您正在寻找一个REPL来输入Ruby代码，让它执行，并查看结果，那么您正在寻找irb命令，而不是ruby。

ruby用于运行文件（例如。ruby my_file.rb），或者不带参数将读取输入标准输入的脚本，当您使用cmd + D退出ruby时将执行该脚本

Ruby使用RVM挂起负载

2 个答案: