Whether ipfs can only have one ipns name

[tedeum]

If I use a different computer, how to operate the original ipfs name?

[lidel]

See:

Can multiple nodes share the same peer id?

Can I copy the “Identity” part of the config file to another computer so I can use the same peer id on multiple computers? Can these computers be up at the same time and serve content without problems?

tl;dr you probably want to create and copy a dedicated key for a name that you want to share between multiple machines