rails s报如下错误
Could not find mimemagic-0.3.2 in any of the sources
Run `bundle install` to install missing gems.
haima@haima-PC:/media/haima/34E401CC64DD0E28/site/go/src/ruby/fofapro$ bundle install
x86_64-linux
x86_64-linux
Following files may not be writable, so sudo is needed:
/home/haima/.rvm/gems/ruby-2.3.8
/home/haima/.rvm/gems/ruby-2.3.8/bin
/home/haima/.rvm/gems/ruby-2.3.8/bin
/home/haima/.rvm/gems/ruby-2.3.8/build_info
/home/haima/.rvm/gems/ruby-2.3.8/bundler
/home/haima/.rvm/gems/ruby-2.3.8/cache
/home/haima/.rvm/gems/ruby-2.3.8/doc
/home/haima/.rvm/gems/ruby-2.3.8/environment
/home/haima/.rvm/gems/ruby-2.3.8/extensions
/home/haima/.rvm/gems/ruby-2.3.8/gems
/home/haima/.rvm/gems/ruby-2.3.8/specifications
/home/haima/.rvm/gems/ruby-2.3.8/wrappers
The dependency tzinfo-data (>= 0) will be unused by any of the platforms Bundler is installing for. Bundler is installing for ruby but the dependency is only for x86-mingw32, x86-mswin32, x64-mingw32, java. To add those platforms to the bundle, run `bundle lock --add-platform x86-mingw32 x86-mswin32 x64-mingw32 java`.
Fetching gem metadata from https://rubygems.org/.......
Your bundle is locked to mimemagic (0.3.2), but that version could not be found in any of the sources listed in your Gemfile. If you haven't changed sources, that means the author of mimemagic (0.3.2) has removed it. You'll need to update your bundle to a version
other than mimemagic (0.3.2) that hasn't been removed in order to install.
解决方法：
sudo bundle update mimemagic
rails s