Installed Ubuntu server but after update and reboot no Ethernet!

Raymond Day
Raymond Day New Member Posts: 67
Found out have to press F7 then can install from USB.

Any way I installed Ubuntu server on it. In the little I had to work with it it does seem fast!

After updates it had to reboot and I did but now it don't get a ip.

If I do a dhclient it comes back with this.

dhclient error while shared libraries: /lib/x86_64-linux-gnu/ invalid ELF header

Just can't connect to it's Ethernet any more.

Any one know a fix?

-Raymond Day


  • Raymond Day
    Raymond Day New Member Posts: 67
    Because no Ethernet wanted to get the RS232 working.

    I put in the code:

    GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX console=tty0 console=ttyS0,115200n8"
    GRUB_TERMINAL_INPUT="console serial"
    GRUB_TERMINAL_OUTPUT="gfxterm serial"
    GRUB_SERIAL_COMMAND="serial --unit=0 --speed=115200"

    In a file here:


    Rebooted and I get some text. I had to swap the UART0_RXD and UART0_TXD wires.

    I get some text as it boots but can't type any thing after it boots.

    Get this text as it boots.

    error: serial port `com0' isn't found.
    error: terminal `serial' isn't found.
    error: terminal `serial' isn't found.

    GNU GRUB version 2.02~beta2-36ubuntu3.9

    ▒*Ubuntu ▒
    ▒ Advanced options for Ubuntu ▒
    ▒ System setup ▒
    ▒ ▒
    ▒ ▒
    ▒ ▒
    ▒ ▒
    ▒ ▒
    ▒ ▒
    ▒ ▒
    ▒ ▒
    ▒ ▒

    Use the and keys to select which entry is highlighted.
    Press enter to boot the selected OS, `e' to edit the commands
    before booting or `c' for a command-line. ESC to return previous
    The highlighted entry will be executed automatically in 0s.

    That is though the RS232.

    Any way to fix it so I can type commands in it?

    This is Ubuntu server no desktop.

    -Raymond Day
  • Raymond Day
    Raymond Day New Member Posts: 67
    I got the Ethernet working! From another Ubuntu server I copied the /lib/x86_64-linux-gnu/

    removed the last two 0's from it's name. Because it just had a link to it from the right name. I put it on a USB drive.

    Then on the Up2 typing on the keyboard I did this.

    fdisk -l
    cd /media/
    mkdir temp
    mount /dev/sda1 /media/temp/
    cp /media/temp/ /lib/x86_64-linux-gnu/
    dhclient enp2s0

    Seen it got a IP then.

    Fixed it! Junk way to do it copy what looks like a bin file from another server.

    -Raymond Day
  • uricohn
    uricohn New Member Posts: 1

    @Raymond Day
    I have the same problem where the Up board won't connect.
    Did you see a link at least in the beginning (first time out of the box) or did you at least had once a connection?
    I am trying to understand if I got a defective board or am I just doing something wrong as it is my first time with the realsense?


  • ccalde
    ccalde New Member Posts: 348 ✭✭✭

    Hi @uricohn ,

    What is your exactly problem with the connection?
    Did you install Ubuntu server (which version??) on a UPSquared board and you don't have any IP, no wired connection?
    And did you try the Raymond fix?


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