在LINUX服务器上使用torch7运行LUA脚本

我正在尝试在我的ubuntu服务器上运行LUA脚本，但遇到以下错误:

> lua: train.lua:6: module 'torch' not found:
>             no field package.preload['torch']
>             no file '/usr/local/share/lua/5.4/torch.lua'
>             no file '/usr/local/share/lua/5.4/torch/init.lua'
>             no file '/usr/local/lib/lua/5.4/torch.lua'
>             no file '/usr/local/lib/lua/5.4/torch/init.lua'
>             no file './torch.lua'
>             no file './torch/init.lua'
>             no file '/usr/local/lib/lua/5.4/torch.so'
>             no file '/usr/local/lib/lua/5.4/loadall.so'
>             no file './torch.so'
>     stack traceback:
>             [C]: in function 'require'
>             train.lua:6: in main chunk
>             [C]: in ?
>

Torch7已在系统中安装。 如何解决？ 谢谢。