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Chassis Management Controller Version 2.0 for Dell PowerEdge VRTX User's Guide

Configuring Linux for Server Serial Console Redirection During Boot

The following steps are specific to the Linux GRand Unified Bootloader (GRUB). Similar changes are necessary for using a different boot loader.
  • NOTE: When you configure the client VT100 emulation window, set the window or application that is displaying the redirected console to 25 rows×80 columns to make sure proper text is displayed. Else, some text screens will appear distorted.

Edit the /etc/grub.conf file as follows:

  1. Locate the general setting sections in the file and type the following two new lines:
    serial --unit=1 --speed=57600
                                        terminal --timeout=10 serial
                                     
  2. Append two options to the kernel line:
    kernel console=ttyS1,57600
  3. If the /etc/grub.conf contains a splashimage directive, comment it out. The following example shows the changes described in this procedure.
    # grub.conf generated by anaconda
                                        #
                                        # Note that you do not have to rerun grub after making
                                        changes
                                        # to this file
                                        # NOTICE: You do not have a /boot partition. This
                                        means that
                                        # all kernel and initrd paths are relative to
                                        /, e.g.
                                        # root (hd0,0)
                                        # kernel /boot/vmlinuz-version ro root=
                                        /dev/sdal
                                        # initrd /boot/initrd-version.img
                                        #
                                        #boot=/dev/sda
                                        default=0
                                        timeout=10
                                        #splashimage=(hd0,2)/grub/splash.xpm.gz
                                        
                                        serial --unit=1 --speed=57600
                                           terminal --timeout=10 serial
                                        
                                        title Red Hat Linux Advanced Server (2.4.9-e.3smp)
                                        root (hd0,0)
                                        kernel /boot/vmlinuz-2.4.9-e.3smp ro root=
                                        /dev/sda1 hda=ide-scsi console=ttyS0 console=
                                        ttyS1,57600
                                        initrd /boot/initrd-2.4.9-e.3smp.img
                                        title Red Hat Linux Advanced Server-up (2.4.9-e.3)
                                        root (hd0,00)
                                        kernel /boot/vmlinuz-2.4.9-e.3 ro root=/dev/sda1
                                        initrd /boot/initrd-2.4.9-e.3.img
                                     

    When you edit the /etc/grub.conf file, follow these guidelines:

    • Disable GRUB's graphical interface and use the text-based interface. Else, the GRUB screen is not displayed in console redirection. To disable the graphical interface, comment out the line starting with splashimage.
    • To start multiple GRUB options to start console sessions through the serial connection, add the following line to all options:
      console=ttyS1,57600

      The example shows console=ttyS1,57600 added to only the first option.


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