Solutions for Linux and vim commands unavailable after environment variables are configured in Ubuntu and Macosx

First, you must know the PAHT content in the original environment variable of your system. Ubuntu is by default: /usr/local/sbin/usr/local/bin/usr/sbin/usr/bin/sbin/bin/usr/bin/X11/usr/games/usr/X11R6/bin it's easy to know this. Execute the following operations (Blue is the command, green is the content of the document) sudocd/usr/binsudo./vi/etc first, you need to know what the PAHT content in the original environment variable of your system is.
Ubuntu is by default:
/Usr/local/sbin/usr/local/bin/usr/sbin/usr/bin/sbin/bin/usr/bin/X11/usr/games/usr/X11R6/bin
It's easy to know this.
Execute the following operations (Blue is the command, green is the content of the document)
Sudo cd/usr/bin
Sudo./vi/etc/environment
------------- Environment default file content ----------------------------------------------------------------
PATH = "/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11: /usr/games"
LANG = "zh_CN.UTF-8"
LANGUAGE = "zh_CN: zh: en_US: en"
Bytes --------------------------------------------------------------------------------------------------------------
Corrected PATH = "".
Only one PATH = "" is left here, and all others are deleted.
Save the modified file and exit

Solve the problem !!