我正在尝试安装Rails。我安装了RVM，然后通过它安装了最新的Ruby版本（它可以工作），但安装Rails失败了：
serge1peshcoff@myLaptop:~$ gem install rails
Building native extensions. This could take a while...
/home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/ext/builder.rb:73: warning: Insecure world writable dir /allext/soft_without_install in PATH, mode 040777
ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
/home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/bin/ruby -r ./siteconf20150911-21759-1c3q6e9.rb extconf.rb
checking if the C compiler accepts ... yes
Building nokogiri using packaged libraries.
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.
Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=/home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/bin/$(RUBY_BASE_NAME)
--help
--clean
--use-system-libraries
/home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/x86_64-linux/digest/md5.so: undefined symbol: rb_Digest_MD5_Init - /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/2.2.0/x86_64-linux/digest/md5.so (LoadError)
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/serge1peshcoff/.rvm/gems/ruby-2.2.1/gems/mini_portile-0.6.2/lib/mini_portile.rb:7:in `<top (required)>'
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:128:in `require'
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:128:in `rescue in require'
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.1/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:39:in `require'
from extconf.rb:395:in `<main>'
extconf failed, exit code 1
Gem files will remain installed in /home/serge1peshcoff/.rvm/gems/ruby-2.2.1/gems/nokogiri-1.6.6.2 for inspection.
Results logged to /home/serge1peshcoff/.rvm/gems/ruby-2.2.1/extensions/x86_64-linux/2.2.0/nokogiri-1.6.6.2/gem_make.out
我搜索了互联网的答案，但我没有发现这样的事情。我试图安装libssl-dev，这是一种情况下的原因，它没有做任何事情。另一个答案说要运行rvm requirements以了解未安装的内容，我也试过了，但它也没有用。所以我完全迷失了。
有谁知道如何解决它？
UPD：我通过nokigiri安装了gem install nokogiri --use-system-libraries，安装时没有错误，但是在运行Rails时我仍然面临同样的错误，如下所示：
serge1peshcoff@myLaptop:/all/Documents/Programming/rails$ rails
/home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require': /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/x86_64-linux/digest/md5.so: undefined symbol: rb_Digest_MD5_Init - /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/2.2.0/x86_64-linux/digest/md5.so (LoadError)
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/gems/railties-4.2.4/lib/rails/generators/app_base.rb:1:in `<top (required)>'
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/gems/railties-4.2.4/lib/rails/generators/rails/app/app_generator.rb:1:in `<top (required)>'
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/gems/railties-4.2.4/lib/rails/commands/application.rb:2:in `<top (required)>'
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/gems/railties-4.2.4/lib/rails/cli.rb:14:in `<top (required)>'
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/serge1peshcoff/.rvm/rubies/ruby-2.2.3/lib/ruby/site_ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/gems/railties-4.2.4/bin/rails:9:in `<top (required)>'
from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/bin/rails:23:in `load'
from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/bin/rails:23:in `<main>'
from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/bin/ruby_executable_hooks:15:in `eval'
from /home/serge1peshcoff/.rvm/gems/ruby-2.2.3/bin/ruby_executable_hooks:15:in `<main>'