我试图输入命令nano ~/.bashrc以便.bashrc在主目录中的文件中包含一些路径，但我无法运行任何命令，并且总是出现以下错误：
rag@rag-Satellite-C640:~$ nano ~/.bashrc
Command 'nano' is available in the following places
* /bin/nano
* /usr/bin/nano
The command could not be located because '/usr/bin:/bin' is not included in the PATH environment variable.
nano: command not found
为什么我正在尝试的任何命令都会发生这种情况？
我想做的是编辑.bashrc文件。