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> My system has developed serious problems related to the emul libs. The |
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> advice given as a reply to my bug has made the system impossible to |
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> upgrade using emerge. It is possible the problem dates back to the |
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> 2004.3->2005.0 upgrade, I don't know. |
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> |
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> Is there a way to build a "from scratch" 2005.1 system over the net |
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> without having to download and boot from a CD? Will it leave my user |
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> directories alone? The installation docs assume that you don't have a |
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> runnig gentoo system and start with a boot CD. |
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|
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I had to install a few Gentoo systems over the net from preexisting Red |
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Hat installations. |
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The way I usually did was: |
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1. Backup any important data (including /home etc) |
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2. Remove the swap from the system (swapoff) |
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3. Change the swap partition from 82 to type 83 (Linux) with fdisk |
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4. Reboot (if necessary after the fdisk) |
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5. Format that partition to the file system you want |
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6. Install a stage3 into that partition |
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7. Chroot into it, do the basic things you need to get your system |
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working. Update the stage3 to the latest version. Get at least the |
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password changed. network configured, ssh etc |
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|
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If downtime is bad and there is enough space, install apache and mysql, |
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configure them etc. |
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As I had to keep downtime to a minimum I'll follow along that patg. |
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8. Add the old root into gentoo's fstab so that it mounts somewhere. |
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Add another line so that the old system /home is mounted as the new /home |
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Do the same with databases and any other directory (such as mail queue |
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etc) that you need to provide service. |
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|
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9. Leave the chroot |
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10. Modify your boot loader to start with the new partition, with maybe a |
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fallback to the old one. |
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|
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11. Reboot |
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12. Log into the (hopefully) new system. |
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13. If everything is ok, start deleting the old system's file from the |
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partition, be careful not to delete the home and database files (or |
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anything mount binded). |
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14. Create a new directory on the oldroot and change to it. |
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15. Move the new system files to the newroot, preserving everything (tar |
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is good for that). Take care to exclude /proc and /sys from it, but do |
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create the directories. Also you should exclude /tmp and recreate it |
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properly. |
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17. Update the fstab for the new system. |
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16. Kill the services, umount anything that you did in 8. |
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17. Modify your boot loader to load the old parttion. |
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18. Reboot |
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19. Check that everything is ok / works |
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20. Redo the swap partition. |
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Everything should come back fine. Of course, YMMV. You need about 1.5gb to |
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do it for a simple system. |
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-- |
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