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When changing the interface with the command vnstat --iface it shows me the following error Error: Interface for --iface missing.

Andy Romero
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  • `--iface` requires an argument - the interface you are going to be looking at. What's the full command you're executing? – Thomas Ward Dec 02 '20 at 19:08
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    it show me this ------ andy@andy-pc:~$ vnstat --iface usb0 Error: Interface "usb0" not found in database. – Andy Romero Dec 02 '20 at 19:21
  • the interface has to be an interface on the system. Is `usb0` an actual interface on the computer? Usually, that's not how network interfaces are named. – Thomas Ward Dec 02 '20 at 20:13
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    Assuming that your wired network interface is eth0, first you must --add that interface to the vnstat database, then you can get stats on it, after it's had some time to accumulate data. See `man vnstat` for more info, and see the examples at the end of the man page. – heynnema Dec 02 '20 at 20:16

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