1、查看lua命令文件
lua -v
which lua
2、查看文件
ll /usr/bin/lua
ll /etc/alternatives/lua-interpreter
3、重新生成链接
sudo mv /etc/alternatives/lua-interpreter /etc/alternatives/lua-interpreter.bak5.1
sudo ln -s /etc/alternatives/lua-interpreter /usr/bin/lua5.3
4、检查lua版本
lua -v
ubuntu18.04上lua多版本切换
原文：https://www.cnblogs.com/xiaomacs/p/11736329.html
