How to redirect an error message to /dev/null?

Question

sudo dmidecode | grep State 2> /dev/null

Boot-up State: Safe
    Power Supply State: Safe
    Thermal State: Safe
Invalid entry length (16). Fixed up to 11

I don't want the Invalid entry error in the output. How do I filter that?

You should put the redirect before the pipe symbol, not after. You're redirecting grep's standard error, but not dmidecode's. — Wildcard
– Wildcard, Commented Jan 27, 2018 at 1:44

Jeff Schaller · Accepted Answer · 2018-01-27 13:58:34Z

2

As Wildcard commented, you've mistakenly redirected grep's stderr instead of sudo/dmidecode's. Use this instead:

 sudo dmidecode 2>/dev/null | grep State

answered Jan 27, 2018 at 13:58

Jeff Schaller♦

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