Question

Ruby版本 - ruby 2.1.5p273（2014-11-13修订版48405）[x86_64-linux]

Error: 
Sorry, you can't use byebug without Readline. To solve this, you need to
rebuild Ruby with Readline support. If using Ubuntu, try `sudo apt-get
install libreadline-dev` and then reinstall your Ruby.
bin/rails:6: warning: already initialized constant APP_PATH
/home/kg/Mysite/bin/rails:6: warning: previous definition of APP_PATH was here
Usage: rails COMMAND [ARGS]

Answer 1

除了安装libreadline-dev之外，尝试将--with-readline-dir选项添加到Ruby的编译中。

CONFIGURE_OPTS="--with-readline-dir=/usr/include/readline" rbenv install 2.3.1

请事先仔细检查readline目录是否存在。

Answer 2

如果你赶时间，

打开你的byebug的history.rb

/Users/user/.rvm/gems/ruby-2.1.5@rails/gems/byebug-9.0.5/lib/byebug/history.rb

并注释掉以下行，

require 'readline'

但是，建议使用byebug进行初学者调试。但是，还有像

这样的替代品

pry, pry-byebug

Answer 3

就像你的错误所说的那样，你需要安装readline（Ubuntu中的libreadline-dev），然后重新安装Ruby ...请执行此操作。

Answer 4

如果您使用的是Fedora，请安装readline-devel，然后重新安装ruby（对我而言，它是ruby-installer）

sudo dnf install readline-devel
ruby-install ruby

Answer 5

ln -s /usr/local/opt/readline/lib/libreadline.dylib 
/usr/local/opt/readline/lib/libreadline.6.dylib

对我有用，多么神奇！

bin / rails服务器无法正常工作

5 个答案: