有人可以告诉我为什么我在尝试添加存储库时会收到此错误，以及我可以做些什么？
当我尝试使用以下方法添加存储库时：
sudo add-apt-repository ppa:upubuntu-com/tor
我收到以下错误：
Command 'sudo' is available in '/usr/bin/sudo'
The command could not be located because '/usr/bin' is not included in the PATH
environment variable.
sudo: command not found
sudo ×1