Re: Need guidance on solving 'no network connectivity' problem
The weirdest thing about your ethtool output is "link detected: no". This usually means that your internet cable is unplugged, but in this case we know that your cable is not unplugged because if it were you couldn't obtain internet access in any OS! I'm also surprised by the lack of any "link partner advertised link modes". This means your machine thinks it is saying "Here I am. This is what I can do, what can you do?", but it isn't talking to anybody who can tell it which communication mode to use. This another indication that linux thinks your cable is unplugged. Your OS thinks it is sending out a greeting and nobody is responding. I'm beginning to think that your hardware is not being recognised appropriately.
I'm also somewhat surprised that you seem to be using twisted pair rather than cat5 cable. Is this true, or is it just another factor in your system's confusion about your hardware?
I'm also surprised that you don't have an inet address in your "ifconfig -a" output. Was this a transcription error on your part, or was this section of that line actually missing from your output? If it was missing, that's obviously part of your problem, your computer doesn't know it's own address (in Linux), so it can't tell anyone else how to reach it, which makes your failure to see any activity at all on eth0 more understandable, if still baffling. Do you have a file called "/etc/resolv.conf"? If so, it should have at least 4 lines. One saying something like "domain my.isp.com"; another saying "search my.isp.com"; and two lines of internet addresses saying "nameserver xxx.yyy.zzz.nnn" with numbers between 0 and 255. This file should have been set up automatically when you installed Linux
The weirdest thing about your ethtool output is "link detected: no". This usually means that your internet cable is unplugged, but in this case we know that your cable is not unplugged because if it were you couldn't obtain internet access in any OS! I'm also surprised by the lack of any "link partner advertised link modes". This means your machine thinks it is saying "Here I am. This is what I can do, what can you do?", but it isn't talking to anybody who can tell it which communication mode to use. This another indication that linux thinks your cable is unplugged. Your OS thinks it is sending out a greeting and nobody is responding. I'm beginning to think that your hardware is not being recognised appropriately.
I'm also somewhat surprised that you seem to be using twisted pair rather than cat5 cable. Is this true, or is it just another factor in your system's confusion about your hardware?
I'm also surprised that you don't have an inet address in your "ifconfig -a" output. Was this a transcription error on your part, or was this section of that line actually missing from your output? If it was missing, that's obviously part of your problem, your computer doesn't know it's own address (in Linux), so it can't tell anyone else how to reach it, which makes your failure to see any activity at all on eth0 more understandable, if still baffling. Do you have a file called "/etc/resolv.conf"? If so, it should have at least 4 lines. One saying something like "domain my.isp.com"; another saying "search my.isp.com"; and two lines of internet addresses saying "nameserver xxx.yyy.zzz.nnn" with numbers between 0 and 255. This file should have been set up automatically when you installed Linux
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