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Thread: Networking/connecting two laptops together issues...

  1. #1
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    Networking/connecting two laptops together issues...

    I've been running ubuntu for a few years, but this is the first time I've tried to do ANY networking on my own. So I may appear ignorant.
    I have my Dell vostro 1000 connected to the internet via wireless. I have a Sharp Note book connected via ethernet cable to the Dell.
    I can't seem to get the Sharp to connect to the internet so I can seek help here getting the wireless card (broadcom card) to work. I can't DL drivers etc.
    The Sharp has ubuntu 9.01 (I believe) installed on it.
    When I click on the network connections icon, it shows Wired connection Auto etho as available. But won't connect.
    I probably need step-by step setup instructions. Do I need to set ip's net mask etc? I searched but failed to find a link/thread that dealt with it specifically.

  2. #2
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    Re: Networking/connecting two laptops together issues...

    Quote Originally Posted by grouchyolddude View Post
    I've been running ubuntu for a few years, but this is the first time I've tried to do ANY networking on my own. So I may appear ignorant.
    I have my Dell vostro 1000 connected to the internet via wireless. I have a Sharp Note book connected via ethernet cable to the Dell.
    I can't seem to get the Sharp to connect to the internet so I can seek help here getting the wireless card (broadcom card) to work. I can't DL drivers etc.
    The Sharp has ubuntu 9.01 (I believe) installed on it.
    When I click on the network connections icon, it shows Wired connection Auto etho as available. But won't connect.
    I probably need step-by step setup instructions. Do I need to set ip's net mask etc? I searched but failed to find a link/thread that dealt with it specifically.
    You will need to set a static IP for each computer

    For example, you can try using this
    On each computer, change the networking settings from DHCP (Automatic) to manual. Enter the below in the ipv4 tab

    Computer 1:
    IP Address: 192.168.10.3
    Netmask: 255.255.255.0

    Computer 2:
    IP Address: 192.168.10.4
    Netmask: 255.255.255.0

    Save it, and computer 1 should be able to ping 192.168.10.4 and computer 2 should be able to ping 192.168.10.3

    Caveat:Some ethernet cards dont do MDI/MDIX (autodetecting if its a straight through or crossover cable). All gigabit cards do. If you are not using a crossover cable, and its not working, make sure you have MDI/MDIX on both computer's ethernet cards. Most computers produced within the last few years or so should have them.
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  3. #3
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    Re: Networking/connecting two laptops together issues...

    hmmm.. I added 192.168.1.113 and 255.255.255.0 to the ipv4 tab hit 'apply' it saved it it appears. Still can't ping each other??
    ip of the Dell is 192.168.1.112 and mask 255.255.255.0 Should I need to reboot the Sharp? It tries to connect, but fails.

  4. #4
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    Re: Networking/connecting two laptops together issues...

    Quote Originally Posted by grouchyolddude View Post
    hmmm.. I added 192.168.1.113 and 255.255.255.0 to the ipv4 tab hit 'apply' it saved it it appears. Still can't ping each other??
    ip of the Dell is 192.168.1.112 and mask 255.255.255.0 Should I need to reboot the Sharp? It tries to connect, but fails.
    Can you post the output of
    Code:
    ifconfig
    on each computer?
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  5. #5
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    Re: Networking/connecting two laptops together issues...

    o@o-Vostro-1000:~$ ifconfig
    eth0 Link encap:Ethernet HWaddr 00:19:b9:80:d6:28
    inet6 addr: fe80::219:b9ff:fe80:d628/64 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:36 errors:0 dropped:0 overruns:0 frame:0
    TX packets:35 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:10872 (10.8 KB) TX bytes:9509 (9.5 KB)
    Interrupt:21

    eth1 Link encap:Ethernet HWaddr 00:1c:26:06:92:d8
    inet addr:192.168.1.112 Bcast:192.168.1.255 Mask:255.255.255.0
    inet6 addr: fe80::21c:26ff:fe06:92d8/64 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:19261 errors:0 dropped:0 overruns:0 frame:6501
    TX packets:19103 errors:16 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:14621571 (14.6 MB) TX bytes:3439681 (3.4 MB)
    Interrupt:18

    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:69 errors:0 dropped:0 overruns:0 frame:0
    TX packets:69 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:0
    RX bytes:4632 (4.6 KB) TX bytes:4632 (4.6 KB)
    on the Dell..
    ifconfig got no return/nothing from the Sharp. However ifconfig -a did.
    Link encap:Ethernet HWaddr oo:40:d0:6c:63:87
    inet6 addr: fe80::240:d0ff:fe6c:6387/64 Scope:link
    UP BROADCAST RUNNING MULTICAST MTU:1500 METRIC:1
    RX packets: 18 errors:0 dropped:0 overruns:0 frame:0
    TX packets: 36 errors: 0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:6228 (6.2KB) TX bytes: 10873 (10.8 KB)
    Interrupt 16

    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 TX PACKETS collisions all show 0

    sorry it took me a bit to type that all in

  6. #6
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    Re: Networking/connecting two laptops together issues...

    Okay.. I followed the instructions here .. http://ubuntuforums.org/showthread.p...40#post7490040 and no have a "wired connection" established. But still no internet access, nor will the machines ping on another. the Vostro won't even ping itself/ip. But the Sharp will w/ 100% success on 5 packages. ???? I'm really lost on that

  7. #7
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    Re: Networking/connecting two laptops together issues...

    Quote Originally Posted by grouchyolddude View Post
    Okay.. I followed the instructions here .. http://ubuntuforums.org/showthread.p...40#post7490040 and no have a "wired connection" established. But still no internet access, nor will the machines ping on another. the Vostro won't even ping itself/ip. But the Sharp will w/ 100% success on 5 packages. ???? I'm really lost on that
    Looks like networkmanager isnt setting your IPs properly
    The above ifconfig output shows that both eth0 interfaces on both computers do not have an ip address

    Try setting the IP manually with the commands below

    Computer 1:
    Code:
    sudo ifconfig eth0 192.168.10.3 netmask 255.255.255.0 up
    sudo ifconfig eth0
    Computer 2:
    Code:
    sudo ifconfig eth0 192.168.10.4 netmask 255.255.255.0 up
    sudo ifconfig eth0
    Last edited by sandyd; August 16th, 2013 at 10:27 PM.
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  8. #8
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    Re: Networking/connecting two laptops together issues...

    o@o-Vostro-1000:~$ sudo ifconfig eth0
    eth0 Link encap:Ethernet HWaddr 00:19:b9:80:d6:28
    inet addr:192.168.10.3 Bcast:192.168.10.255 Mask:255.255.255.0
    inet6 addr: fe80::219:b9ff:fe80:d628/64 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:445 errors:0 dropped:0 overruns:0 frame:0
    TX packets:48 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:71395 (71.3 KB) TX bytes:12560 (12.5 KB)
    Interrupt:21
    the Sharp (computer 2) will now ping the vostro succesfully, but vostro computer 1) fails on packages sent to computer 2
    thanks so much for taking the time n effort to help me. THAT's what I love about linux

  9. #9
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    Re: Networking/connecting two laptops together issues...

    Quote Originally Posted by grouchyolddude View Post
    the Sharp (computer 2) will now ping the vostro succesfully, but vostro computer 1) fails on packages sent to computer 2
    thanks so much for taking the time n effort to help me. THAT's what I love about linux
    No problem

    Lets check if the ip is in the arp table.

    Run
    Code:
    arp -n
    On the vostro
    Last edited by sandyd; August 16th, 2013 at 11:44 PM.
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  10. #10
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    Re: Networking/connecting two laptops together issues...

    o@o-Vostro-1000:~$ arp-n
    No command 'arp-n' found, did you mean:
    Command 'arpon' from package 'arpon' (universe)
    arp-n: command not found
    o@o-Vostro-1000:~$

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