On Tue, 2004-01-20 at 22:03, prince wrote: > Thank you Arnt and Ted, > > It is very helpful. > > Prince. > > On Tue, 20 Jan 2004 04:59:25 +0100, Arnt Karlsen wrote > > On Mon, 19 Jan 2004 18:40:52 -0500, > > Ted Kaczmarek <tedkaz@xxxxxxxxxxxxx> wrote in message > > <1074555651.20675.2.camel@tarkus>: > > > > > On Wed, 2004-01-14 at 15:14, prince wrote: > > > > Just to let you know, This is my /etc/grub.conf > > > > > > > > % sudo cat /etc/grub.conf > > > > > > > > # 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/sda > > > > ### BEGIN AUTOMAGIC KERNELS LIST > > > > default=0 > > > > ..also put in "fallback=0" below your new "default=1". > > > > > > timeout=10 > > > > splashimage=(hd0,0)/grub/splash.xpm.gz > > > > > > > > title Red Hat Linux (2.4.20-28.9BOOT) > > > > root (hd0,0) > > > > kernel /vmlinuz-2.4.20-28.9BOOT ro root=/dev/sda3 > > > > ..behind your "root=/dev/sda3", append " panic=20 ", to avoid kernel > > panics play USS Yorktown on your box. ;-) > > > > > Your default=0, that will always boot the 2.4.20-28.9BOOT, > > > change it to 1 and it will boot the other version. > > > You can also pick the other one manually, but your timeout is only 10 > > > seconds so pay attention :-) when booting. > > > > ..not 10 tenths of a second? ;-) No, its 10 seconds. At least that's the way grub interprets it on my gentoo box. Maybe different distros have compiled grub differently ??? I hope not! > > > > ..and it is also possible to set up serial consoles on modems or > > between remote boxes and have the paralell port control relays > > for power switches, before resorting to ups control tricks. ;-) > > > > -- > > ..med vennlig hilsen = with Kind Regards from Arnt... ;-) > > ...with a number of polar bear hunters in his ancestry... > > Scenarios always come in sets of three: > > best case, worst case, and just in case. > > > some cut and paste from my /boot/grub/grub.conf - Gentoo Linux. --- default 0 fallback 1 timeout 5 splashimage=(hd0,0)/boot/grub/splash.xpm.gz title=Linux 2.6.1 (console on PC) root (hd0,0) kernel /boot/linux-2.6.1 root=/dev/hda3 console=ttyS0 --- notice that I have a console=ttyS0 flag. This gives me a console on a serial port - which means you can control a headless server using just a laptop. For this to work. 1. Kernel must be compiled with console-on-serial-port capability, AND 2. this capability must be enabled at boot time using the "console=tty#" flag. Also, if you are using grub, any changes to grub.conf take effect immediately. You dont need to re-run grub for changes to take effect. I have a /boot/boot entry that symlinks to /boot . This way I can use full /boot/* paths everywhere without stepping all over the boot process - its not my invention, its a gentoo thing. NEVER mess with the fallback once you have it working correctly. Inevitably, with a headless server like yours, you'll make a mistake one day while editing and the fallback will step in to save you. So make only one change at a time. -- Ranjeet Shetye Senior Software Engineer Zultys Technologies Ranjeet dot Shetye2 at Zultys dot com http://www.zultys.com/ The views, opinions, and judgements expressed in this message are solely those of the author. The message contents have not been reviewed or approved by Zultys.
