Ruby on rails 只要gem错误没有这样的文件或目录-crontab

我不知道这是什么问题。

这是控制台输出

$ whenever --update-crontab
Системе не удается найти указанный путь.
C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/whenever-0.10.0/lib/whenever/command_line.rb:77:in `popen': No such file or directory - crontab - (Errno::ENOENT)
        from C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/whenever-0.10.0/lib/whenever/command_line.rb:77:in `write_crontab'
        from C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/whenever-0.10.0/lib/whenever/command_line.rb:38:in `run'
        from C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/whenever-0.10.0/lib/whenever/command_line.rb:6:in `execute'
        from C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/whenever-0.10.0/bin/whenever:44:in `<top (required)>'
        from C:/RailsInstaller/Ruby2.3.3/bin/whenever:22:in `load'
        from C:/RailsInstaller/Ruby2.3.3/bin/whenever:22:in `<main>'

$where--更新crontab
Системе не удается найти указанный путь.
C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/where-0.10.0/lib/where/command_-line.rb:77:在'popen'中：没有这样的文件或目录-crontab-（Errno:：enoint）
来自C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/where-0.10.0/lib/where/command_-line.rb:77:in'write_-crontab'
来自C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/where-0.10.0/lib/where/command_-line.rb:38:in'run'
来自C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/where-0.10.0/lib/where/command_-line.rb:6:in'execute'
从C:/RailsInstaller/Ruby2.3.3/lib/ruby/gems/2.3.0/gems/where-0.10.0/bin/where:44:in`'
从C:/RailsInstaller/Ruby2.3.3/bin/无论何时：22:在“装载”中
从C:/RailsInstaller/Ruby2.3.3/bin/where:22:in`'

是一个Ruby gem，它为编写和部署cron作业提供了清晰的语法

该软件实用程序是类Unix计算机操作系统中基于时间的作业调度器，不能在windows计算机上使用