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For those of you who don't want to do the tap-dance listed at... |
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http://www.gentoo.org/doc/en/liveusb.xml |
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* My netbook's harddrive is normally /dev/sda, except when I boot from a |
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USB stick. The stick will become /dev/sda and the harddrive becomes |
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/dev/sdb |
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|
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* My desktop's harddrive is also /dev/sda. I took the linux minimal |
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install ISO, ran isohybrid on it, with the command... |
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isohybrid install-x86-minimal-20121213.iso |
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If you don't have isohybrid... |
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emerge sys-boot/syslinux |
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* I then copied it over to a USB stick (/dev/sdb) with the command... |
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dd bs=4M if=install-x86-minimal-20121213.iso of=/dev/sdb |
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Note that it's just the device letter. There is no partition number. |
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Your letter may be different. Note also that the USB stick must *NOT* |
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be mounted. - WARNING - be absolutely certain you have the letter right. |
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E.g. using your harddrive's device letter would zap your harddrive. |
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* I booted from the USB key and had an uneventful install. There were a |
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few differences... |
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- stuff that would normally be done to /dev/sda was done to /dev/sdb, |
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because the USB stick with the install ISO was /dev/sda |
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- I don't know if it was the install-from-USB, or my weird lan |
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(192.168.123.248/248), but net-setup did not take for my wired eth0 |
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address. I ran ifconfig and route manually. |
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|
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- lilo had to be set up differently for the first boot. This is a |
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section in its own right |
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* lilo will be written when the netbook's harddrive is /dev/sdb, but |
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when the USB key is removed, it will boot with the harddrive as |
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/dev/sda. lilo does not allow you to specify a non-existant partition |
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in the "image" root section. But fortunately, you can do so in the |
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"append" line, and even more fortunately, the "append" line overrides |
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the "image" root section. Here's what I did... |
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|
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- WARNING - Change the "# MBR to install LILO to:" section to |
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# MBR to install LILO to: |
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boot = /dev/sdb |
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The default /dev/sda will overwrite the boot record of the install |
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USB stick, and not update your harddrive |
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- Since my root is on partition ID 6, I set the image entry like so. |
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Adjust for your system |
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image = /boot/kernel-production |
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root = /dev/sdb6 |
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label = Production |
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read-only # read-only for checking |
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append = "root=/dev/sda6" |
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|
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Note that the main entry specifies root as /dev/sdb6 but the append |
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entry specifies root as root=/dev/sda6. |
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|
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- run the "lilo" command. It will issue a warning about not going to |
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the first disc; ignore the warning. Reboot, and remember to take |
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out the USB stick before the system can boot from it. |
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- First thing to do after the first boot is to edit /etc/lilo.conf to |
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normal values; i.e. usually put "/dev/sda" in as expected |
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# MBR to install LILO to: |
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boot = /dev/sda |
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image = /boot/kernel-production |
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root = /dev/sda6 |
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label = Production |
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read-only # read-only for checking |
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append = "" |
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Adjust for your system. Then run lilo. You now have a standard |
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lilo setup. |
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* You can keep the USB stick as "rescue CD on a USB stick". If you want |
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to return the USB stick to normal use, you'll have to zero out the |
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first sector before you can repartition and reformat it. The command |
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(assuming the stick is /dev/sdb) is... |
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dd count=1 bs=512 if=/dev/zero of=/dev/sdb |
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|
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- WARNING - be absolutely certain you have the letter right. E.g. |
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using your harddrive's device letter would zap your harddrive. |
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|
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-- |
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Walter Dnes <waltdnes@××××××××.org> |
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I don't run "desktop environments"; I run useful applications |