That is because all of the $f_stdout values derived from the same SSH connection are the same handle. You will need a separate SSH channel for each individual traceping. Look at the "connection multiplexing" features in OpenSSH for more.

Edit: So Net::OpenSSH already implements multiplexing, so the problem is something else.

In reply to Re: net::OpenSSH several commands, stdout are mixed up by jcb
in thread net::OpenSSH several commands, stdout are mixed up by Bolemo

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