How to remove a damaged Wired Connection

[Robert Heller]

At Sun, 28 Aug 2016 16:22:10 +0200 "Ubuntu user technical support,  not for general discussions" <ubuntu-users at lists.ubuntu.com> wrote:

> 
> On Sun, 28 Aug 2016 15:18:15 +0200, Chas IRONS wrote:
> >My Settings/Network shows two Wired entries (because my ADSL service
> >was poor so my ISP gave me a wireless router that works) but my browser
> >will not connect if the router is switched on first.
> >
> >The lower Wired entry for the eth0 DSL router shows "Cable unplugged"
> >because it was replaced by the eth1 wireless router.
> 
> Hi,
> 
> could it be, that you switched from PPPoE to DHCP, but you still
> connect by cable and not by wifi? There was likely an issue with the
> modem and not with ADSL, so the modem to dial up was replaced by the
> router. The router likely provides LAN and WLAN.
> 
> However, wifi unlikely is eth1, it should be wlan0, wlan1 ... wlann.

Hmmm... Not necessarily -- it is quite possible for wifi to be eth1.  It all 
depends on what is in /etc/udev/rules.d/70-persistent-net.rules and 
/etc/network/interfaces. 

> 
> What's the output of
> 
>   lsb_release -rc; ifconfig -a
> 
> ?
> 
> I can't help you with Network Manager and also not really with wifi in
> general, since I'm using a router by LAN, not by WLAN.
> 
> However, is your wifi thingy up?
> 
> If I connect a wifi thingy by USB, "ifconfig -a" shows it...
> 
> 
> 
>   $ ifconfig -a
>   enp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>           [snip]
> 
>   lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
>           [snip]
> 
>   wlp0s19f3u1: flags=4098<BROADCAST,MULTICAST>  mtu 1500
>           [snip]
> 
> 
> 
> ...but it's not shown by ifconfig...
> 
> 
> 
>   $ ifconfig
>   enp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>           [snip]
> 
>   lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
>           [snip]
> 
> 
> 
> It requires to bring the Interface up...
> 
> 
> 
>   $ sudo ip link set wlp0s19f3u1 up
> 
> 
> 
> ...then its shown:
> 
> 
> 
>   $ ifconfig
>   enp3s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
>           [snip]
> 
>   lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
>           [snip]
> 
>   wlp0s19f3u1: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
>           [snip]
> 
> 
> 
> Regards,
> Ralf
> 
> 

-- 
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