システム(64ビットubuntu 12.04)にherokuをインストールしようとしましたが、実際にインストールしてもエラーは発生しません。しかし、heroku ログインしようとすると、次のエラーが発生します。
/usr/lib/ruby/1.8/x86_64-linux/readline.so: libreadline.so.5: cannot open shared object file: No such file or directory - /usr/lib/ruby/1.8/x86_64-linux/readline.so (LoadError)
from /usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `require'
from /var/lib/gems/1.8/gems/heroku-2.31.4/lib/heroku/command/run.rb:1
from /usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `gem_original_require'
from /usr/lib/ruby/vendor_ruby/1.8/rubygems/custom_require.rb:36:in `require'
from /var/lib/gems/1.8/gems/heroku-2.31.4/lib/heroku/command.rb:14:in `load'
from /var/lib/gems/1.8/gems/heroku-2.31.4/lib/heroku/command.rb:13:in `each'
from /var/lib/gems/1.8/gems/heroku-2.31.4/lib/heroku/command.rb:13:in `load'
from /var/lib/gems/1.8/gems/heroku-2.31.4/lib/heroku/cli.rb:27:in `start'
from /var/lib/gems/1.8/gems/heroku-2.31.4/bin/heroku:16
from /usr/local/bin/heroku:19:in `load'
from /usr/local/bin/heroku:19
何か案は?