我正在关注walk-through以开始使用Ruby Backup gem。
我跑了gem install backup但运行正常，但是当我试图跑时：
backup generate:model --trigger my_backup \
--archives --storages='local' --compressor='gzip' --notifiers='mail'
我收到错误消息：
The program 'backup' is currently not installed. You can install it by typing:
sudo apt-get install openafs-client
我正在使用Ubuntu 14.04。
知道我的问题是什么或如何解决它？
更新：
- Ruby版本：ruby 2.1.6p336 (2015-04-13 revision 50298) [x86_64-linux]
- 使用rbenv
echo $PATH
/usr/local/heroku/bin:/home/stoebelj/.rbenv/plugins/ruby-build/bin:/home/stoebelj/.rbenv/shims:/home/stoebelj/.rbenv/bin:/home/stoebelj/.rbenv/plugins/ruby-build/bin:/home/stoebelj/.rbenv/shims:/home/stoebelj/.rbenv/bin:/home/stoebelj/.rbenv/plugins/ruby-build/bin:/home/stoebelj/.rbenv/shims:/home/stoebelj/.rbenv/bin:/home/stoebelj/.rbenv/plugins/ruby-build/bin:/home/stoebelj/.rbenv/shims:/home/stoebelj/.rbenv/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/usr/lib/jvm/java-8-oracle/bin:/usr/lib/jvm/java-8-oracle/db/bin:/usr/lib/jvm/java-8-oracle/jre/bin:/home/stoebelj/.rvm/bin:/home/stoebelj/.rvm/bin