First, the users have to include the alias (or shell function) in their .bashrc;

Ah, I thought there was a file like /etc/profile for per-interactive-shell startup.

Finally, it works reliably only if the user consistently uses cp to copy the file

Which is what the OP asked.

In reply to Re^3: How to let perl knows if somebody copies a file by ikegami
in thread How to let perl knows if somebody copies a file by Anonymous Monk

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