Excellent step-by-step! +100 upvotes! ;-)
The only thing I’d add is that, if you can get an external IP address (e.g. 204.110.11.131 (inficad.com - don’t ask) or 216.58.194.206 (one possible value for google.com) and then do a traceroute -n to that address, you can see (without needing DNS) if the packets get out, and how far they get if they don’t get all the way out….
So, “traceroute -n 216.58.194.206”
Unfortunately, traceroute is not always installed by default - GO DO THAT NOW!!! ;-) Since when you need it, you won’t be able to get it!
From: PLUG-discuss [
mailto:plug-discuss-bounces@lists.phxlinux.org] On Behalf Of Michael Butash
Sent: Tuesday, January 03, 2017 12:34 PM
To: Main PLUG discussion list
Subject: Re: Offline
Just work your way up the network osi model in troubleshooting. Everyone should learn some networking these days, one way or another (speaking as a bofh network guy that deals with non-networking app and developers folk commonly - don't be part of the problem).
####
## Layer 1/2, got link? note "state"
> ip link
## If no link, check cable plugged in for blinky lights
####
## Layer 3, got ip?
> ip addr
## If no ip, check dhcp on the network
## Optional: Set static ip for temporary troubleshooting, insert proper subnets here:
ip addr add 192.168.1.100 255.255.255.0 dev eth0
ip route add default 192.168.1.1
####
## Layer 3, verify arp to gateway
ip nei | grep `ip route | grep default | awk '{ print $3 }'`
## If no arp for gateway, check router/switch network
####
## Layer 3, ping the gateway (whatever that is for you)
ping `ip route | grep default | awk '{ print $3 }'`
## If no response, check prior steps again
####
## Layer 3/4, verify resolv.conf dns resolution and life beyond default route
ping google.com<
http://google.com>
## If no dns life outside router, check the router has connectivity to the internet
####
## pull up a browser to google.com<
http://google.com> to test layer 4-7 stuff
On Tue, Jan 3, 2017 at 9:10 AM, Carruth, Rusty <
Rusty.Carruth@smartm.com<
mailto:Rusty.Carruth@smartm.com>> wrote:
I’ll guess that DHCP server on your router was dead.
But to know for sure - are all your systems using DHCP, or are some using static?
IF your windows side is set for static, and the Linux side is DHCP, then this would be expected - windows works, linux doesn’t.
But I’m just guessing (however, I had a router once that would lose its DHCP server on a semi-regular basis. I considered putting it on some sort of auto-reboot device (power cycle it once a day) - finally just replaced the stupid thing ;-)
Rusty
From: PLUG-discuss [
mailto:plug-discuss-bounces@lists.phxlinux.org<
mailto:plug-discuss-bounces@lists.phxlinux.org>] On Behalf Of Michael
Sent: Monday, January 02, 2017 1:42 PM
To: PLUG
Subject: Re: Offline
I'm back. I just had to reset the router..... but why would that work if windows still worked?
On Mon, Jan 2, 2017 at 11:31 AM, Michael <
bmike1@gmail.com<
mailto:bmike1@gmail.com>> wrote:
The TV server, also linux, is still online. It is part of the same network.
On Jan 2, 2017 11:22 AM, "Michael" <
bmike1@gmail.com<
mailto:bmike1@gmail.com>> wrote:
I am now offline in my Linux box. Windows is up and happy and the modem is up and happy too. Heck, the network connection shows I'm connected too. I don't know what to do. What led up to this is I was trying something with th faulty SD card. .. grated said to run, chkdsk /f , twice so I boot into Windows to do that ,couldn't do it though. Then when I boot back to Linux to reformat it there was no connectivity.
--
:-)~MIKE~(-:
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