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Thread: No internet access, it used to work

  1. #1
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    Mar 2011
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    Long Beach, CA
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    Ubuntu 10.04 Lucid Lynx

    No internet access, it used to work

    When I turned my desk top on this afternoon I could not access the internet. It worked this morning. When I look at the Network Connections it tells me that Auto eth0 was last used "never", and I currently have No Network connection.

    I am using Ubuntu 10.10.

    Is there anything I might do to restore the connection other than a full install? What went wrong? Everything seemed normal when I shut it down this morning. Any ideas?

  2. #2
    Join Date
    Dec 2007
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    Re: No internet access, it used to work

    please open a terminal (Applications -> Accessories) and post back the output of these commands:

    Code:
    sudo ifconfig -a
    nslookup www.ubuntuforums.org
    cat /etc/network/interfaces
    cat /etc/resolv.conf
    this sounds like a simple networking issue, so no need to be thinking about reinstalling (at least not yet).
    Last edited by doas777; May 25th, 2011 at 01:32 AM.
    Things are rarely just crazy enough to work, but they're frequently just crazy enough to fail hilariously.

  3. #3
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    Re: No internet access, it used to work

    Do I enter that all at once, or a line at a time ? Sorry to be so lame, but I'm kinda new at this Ubuntu stuff.

  4. #4
    Join Date
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    Re: No internet access, it used to work

    Quote Originally Posted by halibaitor View Post
    Do I enter that all at once, or a line at a time ? Sorry to be so lame, but I'm kinda new at this Ubuntu stuff.
    my appologies.
    one line at a time.
    you can copy into/paste out of a terminal with rightclicks or by using Ctrl+Shift+C and Ctrl+Shift+V
    Things are rarely just crazy enough to work, but they're frequently just crazy enough to fail hilariously.

  5. #5
    Join Date
    Apr 2010
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    1,584
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    Ubuntu 10.10 Maverick Meerkat

    Re: No internet access, it used to work

    They need one command that does all four of those commands.

    I made a little bash script file and put it into my common path directory. It's great.

  6. #6
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    Re: No internet access, it used to work

    this be strange. I got a bunch of stuff on the first line, but no easy way to get it out of the desktop to this netbook so i can post it... I'm gonna have to put it on a jump drive to transfer it. It will take a few minutes.

  7. #7
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    Re: No internet access, it used to work

    OK... here is the output from the first line. Since there is no internet connection the rest of it failed.


    eth0 Link encap:Ethernet HWaddr 00:c0:f0:5a:27:81
    inet6 addr: fe80::2c0:f0ff:fe5a:2781/64 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:0 errors:0 dropped:0 overruns:0 frame:0
    TX packets:0 errors:7 dropped:0 overruns:0 carrier:14
    collisions:0 txqueuelen:1000
    RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
    Interrupt:21 Base address:0xcc00

    lo Link encap:Local Loopback
    inet addr:127.0.0.1 Mask:255.0.0.0
    inet6 addr: ::1/128 Scope:Host
    UP LOOPBACK RUNNING MTU:16436 Metric:1
    RX packets:1133 errors:0 dropped:0 overruns:0 frame:0
    TX packets:1133 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:0
    RX bytes:45998 (45.9 KB) TX bytes:45998 (45.9 KB)

    vboxnet0 Link encap:Ethernet HWaddr 0a:00:27:00:00:00
    BROADCAST MULTICAST MTU:1500 Metric:1
    RX packets:0 errors:0 dropped:0 overruns:0 frame:0
    TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

  8. #8
    Join Date
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    Ubuntu 10.10 Maverick Meerkat

    Re: No internet access, it used to work

    Power cycle your entire network (in this order, modem, router, PC) and run those commands again. See if you have anything different showing.

    Repost the results so we can compare as well.

  9. #9
    Join Date
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    Re: No internet access, it used to work

    This is a bit different...

    eth0 Link encap:Ethernet HWaddr 00:c0:f0:5a:27:81
    inet6 addr: fe80::2c0:f0ff:fe5a:2781/64 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:0 errors:0 dropped:0 overruns:0 frame:0
    TX packets:0 errors:5 dropped:0 overruns:0 carrier:10
    collisions:0 txqueuelen:1000
    RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
    Interrupt:21 Base address:0xcc00

    lo Link encap:Local Loopback
    inet addr:127.0.0.1 Mask:255.0.0.0
    inet6 addr: ::1/128 Scope:Host
    UP LOOPBACK RUNNING MTU:16436 Metric:1
    RX packets:2119 errors:0 dropped:0 overruns:0 frame:0
    TX packets:2119 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:0
    RX bytes:78900 (78.9 KB) TX bytes:78900 (78.9 KB)

    vboxnet0 Link encap:Ethernet HWaddr 0a:00:27:00:00:00
    BROADCAST MULTICAST MTU:1500 Metric:1
    RX packets:0 errors:0 dropped:0 overruns:0 frame:0
    TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

    terry@terry-HP-d220-MT-DG266A:~$ nslookup www.ubuntuforums.org
    ;; connection timed out; no servers could be reached

    terry@terry-HP-d220-MT-DG266A:~$ cat /etc/network/interfaces
    auto lo
    iface lo inet loopback

    terry@terry-HP-d220-MT-DG266A:~$ cat /etc/resolv.conf
    # Generated by NetworkManager
    nameserver 192.168.10.1

  10. #10
    Join Date
    Apr 2010
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    1,584
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    Ubuntu 10.10 Maverick Meerkat

    Re: No internet access, it used to work

    Ok, next to a physical inspection of all your network cable connections. All of them. Maybe something creeped out over time. If that isn't it, does the live disc have internet when you boot from that?

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