Rails 升级到 Ubuntu 18.04 后出现控制台错误

Question

从 ubuntu 16.04 升级到 ubuntu 18.04 后，当从 rails 项目的根目录运行ning rails console 时，我收到以下错误.只有控制台似乎受到影响，我可以毫无问题地启动 puma 服务器。

Running via Spring preloader in process 23887
/home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `require': libreadline.so.6: cannot open shared object file: No such file or directory - /home/user/.rvm/rubies/ruby-2.4.1/lib/ruby/2.4.0/x86_64-linux/readline.so (LoadError)
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `block in require'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:258:in `load_dependency'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `require'
    from /home/user/.rvm/rubies/ruby-2.4.1/lib/ruby/2.4.0/irb/completion.rb:10:in `<top (required)>'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `require'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `block in require'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:258:in `load_dependency'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `require'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/railties-5.1.6/lib/rails/commands/console/console_command.rb:2:in `<top (required)>'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `require'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `block in require'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:258:in `load_dependency'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `require'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/railties-5.1.6/lib/rails/command/behavior.rb:82:in `block (2 levels) in lookup'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/railties-5.1.6/lib/rails/command/behavior.rb:78:in `each'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/railties-5.1.6/lib/rails/command/behavior.rb:78:in `block in lookup'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/railties-5.1.6/lib/rails/command/behavior.rb:77:in `each'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/railties-5.1.6/lib/rails/command/behavior.rb:77:in `lookup'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/railties-5.1.6/lib/rails/command.rb:68:in `find_by_namespace'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/railties-5.1.6/lib/rails/command.rb:42:in `invoke'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/railties-5.1.6/lib/rails/commands.rb:16:in `<top (required)>'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `require'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `block in require'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:258:in `load_dependency'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:292:in `require'
    from /home/user/dev/projects/SRTrackerMySQL/bin/rails:9:in `<top (required)>'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:286:in `load'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:286:in `block in load'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:258:in `load_dependency'
    from /home/user/.rvm/gems/ruby-2.4.1/gems/activesupport-5.1.6/lib/active_support/dependencies.rb:286:in `load'
    from /home/user/.rvm/rubies/ruby-2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:59:in `require'
    from /home/user/.rvm/rubies/ruby-2.4.1/lib/ruby/site_ruby/2.4.0/rubygems/core_ext/kernel_require.rb:59:in `require'
    from -e:1:in `<main>'

我已经运行 bundle install 并在新的 rails 项目中尝试过 Rails 5.1.6 和 Rails 5.2

我也试过运行宁RAILS_ENV=production bundle exec rails console

我正在使用 Ruby 版本：

ruby 2.4.1p111 (2017-03-22 revision 58053) [x86_64-linux]

Answer 1

您需要确保已安装 readline。您正在使用 RVM，因此您可以运行:

rvm requirements

它应该有助于确保您已安装所需的一切，然后是：

rvm reinstall 2.4.1

如果需要确保您的 ruby 一切顺利。

Answer 2

从 Ubuntu 从 16.04 升级到 18.04 后，我也无法运行 rails console。我得到了类似的东西：

-bash: error while loading shared libraries: libreadline.so.6: cannot open shared object file: No such file or directory

我不得不按照此处发布的说明再次重新安装 rvm： https://github.com/rvm/ubuntu_rvm

Answer 3

我遇到了完全相同的问题，但我们使用 rbenv 而不是 rvm。与 Brian 类似的答案对我有用：

rbenv uninstall 2.4.1
rbenv install 2.4.1

Answer 4

升级后我遇到了同样的问题。我的猜测是 RVM 出现了问题。

所以，先卸载RVM。

rvm implode

然后，执行以下命令再次安装 RVM

sudo apt install gnupg2
gpg2 --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
cd /tmp
curl -sSL https://get.rvm.io -o rvm.sh
less /tmp/rvm.sh
cat /tmp/rvm.sh | bash -s stable --rails
source /home/admat/.rvm/scripts/rvm

重新加载 RVM

rvm reload

安装您的 ruby 版本

rvm install _version_

使用 bundle 命令安装 gems

bundle install

完成 !!!!!

如果您想了解有关将 ruby 安装到 ubuntu 18.04 的更多详细信息，请尝试以下 link Install ruby on rails with Ubuntu 18.04

Answer 5

重新安装 Ruby 并重新散列 rbenv 对我不起作用。最后，我选择了当前安装的 libreadline.so7

的简单符号链接

locate libreadline.so

这返回了一整套可能的选项，但最有可能可用的似乎是 /lib/x86_64-linux-gnu/libreadline.so.7

sudo ln -s /lib/x86_64-linux-gnu/libreadline.so.7 /lib/x86_64-linux-gnu/libreadline.so.6

链接后，我现在可以运行 rails console 并再次使用 byebug。

Answer 6

运行终端上的以下代码为我解决了问题：

cd /lib/x86_64-linux-gnu
sudo ln -s libreadline.so.7.0 libreadline.so.6

Rails 升级到 Ubuntu 18.04 后出现控制台错误

Rails Console error after upgrading to Ubuntu 18.04

ruby-on-rails

ruby

ruby-on-rails-5.1

ruby-on-rails-5.2