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When running uptime on Terminal.app on OS X Catalina, I'm seeing this error: 

rcook@Richs-iMac (~ ): uptime
uptime: /dev/ttys021: No such file or directory
13:26  up 5 days, 21:09, 3 users, load averages: 1.93 2.43 2.45

How can I troubleshoot this? Other programs such as "echo" or "ls" do not have this error.
I tried quitting Terminal.app and restarting. No love. Why is uptime looking for /dev/ttys021?
Note: This question has been asked in another thread here but the "answer" they came up with ("Just open up 21 more terminals.") was extremely unsatisfactory.
Thanks!

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  • 1
    Does the problem persist after a reboot?
    – nohillside ♦
    Commented Mar 5, 2020 at 6:40
  • No, it doesn't. I guess it's "fixed" but I really want to know what caused it. I guess I'll never know, unless it comes back again. Sigh... thanks
    – Rich
    Commented Mar 5, 2020 at 10:14
  • I’m confused. You say it doesn’t fix it, but it’s fixed. Huh?
    – Allan
    Commented Mar 5, 2020 at 10:16
  • Nope, didn't say that.
    – Rich
    Commented Mar 6, 2020 at 1:59

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