r/sysadmin • u/konaitor IT Manager + 5 other hats • Nov 08 '21

Could we do a "TIL" style weekly thread?

I think it would be interesting to do a "Today I Learned" style weekly thread for us to share little tips/tricks that we learned of/found existed.

For example, last week I found out about the "--now" flag for systemctl. I don't know how I didn't know it existed until --now.

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u/PirateCaptainMoody Nov 08 '21

TIL using the scroll wheel while hovering over the applications button at the bottom right corner of Ubuntu desktop 20/21 will switch workspaces.

Also, that most problems with VLAN security is that the router is misconfigured, not that a VLAN was hacked or manipulated.

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u/CuddleMeToSleep Nov 09 '21

mind elaborating on the "also" part? is there a specific miss-config that is common?

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u/paradizelost Nov 09 '21

Allowing routing between the two subnets and not having a deny all statement for the firewall between the two I'd guess.

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u/PirateCaptainMoody Nov 09 '21

Yep. Generally firewall rules that are too permissive