This assumes you have installed OpenResty on a Linux system.

The resty command line tool can be used to issue in line commands, like this.

~]# resty -e 'print("Hello World")'
Hello World

Another approach is to place commands in a LUA file. Let's say foo.lua contains the following.

print("Hello World")

Here is how you would invoke foo.lua.

~]# resty foo.lua
Hello World