The Planet Forums > Redhat ROD/Remote Console How To

Full Version: Redhat ROD/Remote Console How To

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gbock

Jan 2 2005, 10:58 AM

Redhat with Grub:

1. Edit grub.conf with your favorite editor so you can manipulate grub and the boot process via remote console:

CODE

serial --unit=0 --speed=9600

terminal --timeout=10 serial console

Example:

CODE

# grub.conf generated by anaconda

#

# Note that you do not have to rerun grub after making changes to this file

# NOTICE: You have a /boot partition. This means that

# all kernel and initrd paths are relative to /boot/, eg.

# root (hd0,0)

# kernel /vmlinuz-version ro root=/dev/hda3

# initrd /initrd-version.img

#boot=/dev/hda

serial --unit=0 --speed=9600

terminal --timeout=10 serial console

default=0

timeout=3

You will also need to add options to the kernel line if you want to see the kernel booting and if you need to do file system maintenance via the remote console (IE it is stuck at fsck errors):

CODE

console=tty0 console=ttyS0,9600

Example:

CODE

title Red Hat Enterprise Linux ES (2.4.21-27.EL)

root (hd0,0)

kernel (hd0,0)/vmlinuz-2.4.21-27.EL root=/dev/hda3 console=tty0 console=ttyS0,9600

initrd (hd0,0)/initrd-2.4.21-27.EL.img

NOTE Your kernel line may differ such as Kernel version and root= device. DO NOT CHANGE THESE, simply append the line with console options.

2. If you want shell console access after the boot process you will need to do the following:

Add the following to the bottom of /etc/inittab:

CODE

co:12345:respawn:/sbin/agetty -L 9600 ttyS0 vt100

Add the following to the bottom of /etc/securetty:

CODE

ttyS0

Restart getty to get immediate access to Remote Console:

CODE

telinit q

If you have any problems please submit a support ticket.

uneedawebsite

Jan 17 2007, 06:50 AM

What about redHat with LILO?

drphp

Jan 17 2007, 06:59 AM

QUOTE (uneedawebsite @ Jan 17 2007, 12:50 PM)

What about redHat with LILO?

CODE

serial=0,9600n8

and add this to your kernel image

CODE

append="console=tty0 console=ttyS0,9600n8"

devGOD

Jan 21 2007, 12:13 AM

which grub...?

/etc/grub.conf
/boot/grub/grub.conf

aledesma

Feb 7 2007, 06:01 PM

QUOTE (devGOD @ Jan 21 2007, 12:13 AM)

which grub...?

/etc/grub.conf
/boot/grub/grub.conf

The only one that matters.... /boot/grub/menu.lst

seriously though, /etc/grub.conf should be a symlink to /boot/grub/grub.conf (which either links to menu.lst or menu.lst links to grub.conf)

So, to answer your question, the one in /boot/grub as the bootloader(grub) would not know what to mount in order to get to /etc/grub.conf.

ChuFuong

Nov 26 2008, 10:21 AM

all matter, just depends on what your trying to do, but yeah the one you mentioned IS the MOST important.

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