Hack of the day: remote-reboot

I had to clone a server to another server (1:1 copy using dd+netcat) but didn't want to stay at the customer's place until the task finished. So I executed 'Start ssh; passwd' to be able to login remotely. But how to reboot the server and get rid of the CD so the harddisk system boots instead of the grml-CD without manual interaction at customer's place? Server systems usually don't move in/re-insert an ejected CD on reboot - that's nice for what we need. So all I had to do was:

eject &>/dev/null
umount -l /cdrom
eject /dev/cdrom
echo b > /proc/sysrq-trigger
This entry was posted by mika on Saturday, September 29. 2007 at 11:54. and is filed under general. You can leave a response, or trackback from your own blog.

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  1. mihi says:
    #1 2007-09-30 16:05 (Reply)

    I usually configure the machines so that they do not boot from CD automatically but allow to boot from CD using the boot menu (usually F12, depending on the BIOS). And I usually use grml2ram and take the CD with me afterwards. Your hack is nice, but i doubt I'll ever need it. mihi


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