10

从 ubuntu 16.04 升级到 ubuntu 18.04 后，rails console从 rails 项目的根目录运行时收到以下错误。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>'

我已经运行并bundle install尝试了新的 Rails 项目Rails 5.1.6Rails 5.2

我也试过跑步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]
4

6 回答 6

15

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安装了所需的一切，然后是：

rvm reinstall 2.4.1

如果需要确保您的红宝石很好用。

于 2018-04-19T02:27:39.843 回答
11

我有同样的确切问题，但我们使用rbenv而不是rvm. 对布赖恩的类似回答对我有用：

rbenv uninstall 2.4.1
rbenv install 2.4.1
于 2018-09-07T23:01:40.443 回答
4

在终端上运行以下代码为我解决了这个问题：

cd /lib/x86_64-linux-gnu
sudo ln -s libreadline.so.7.0 libreadline.so.6
于 2019-11-26T22:38:19.427 回答
2

升级后我遇到了同样的问题。我的猜测是问题发生在 RVM 上。

所以，首先卸载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

安装你的 ruby​​ 版本

rvm install _version_

使用 bundle 命令安装 gem

bundle install

完毕 ！！！！！

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

于 2018-09-25T12:54:31.260 回答
2

重新安装 Ruby 和重新散列 rbenv 对我不起作用。最后，我选择了当前安装的简单符号链接libreadline.so7

locate libreadline.so

这返回了可能选项的完整列表，但最有可能可用的选项似乎是/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，我现在可以再次运行rails console和使用byebug。

于 2019-11-20T21:03:41.443 回答
1

rails console将 Ubuntu 从 16.04 升级到 18.04 后，我也无法运行。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

于 2018-08-31T13:55:31.063 回答