无法在linux上卸载heroku或heroku-toolbelt

Question

当我运行sudo apt-get --purge remove heroku-toolbelt或sudo apt-get --purge remove heroku

时

我得到：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package heroku

和toolbelt：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package heroku-toolbelt