• TipAndDoc/boot
  • TipAndDoc/boot
  • TipAndDoc/boot/GRUB
  • TipAndDoc/boot/Linux
  • PXE
    • TipAndDoc/boot/PXE
    • TipAndDoc/boot/PXE/pxelinux
  • TipAndDoc/boot/multiboot

• ​USBブート推進協議会
• ​OS Circular

  OS Circular is a framework of Internet Disk Image Distributor for anonymous OSes.

  • via ​twitter:syonbori/status/42252753615065088

• ​Minimal CD Image内のlinux, initrd.gzと ​http://jp.archive.ubuntu.com/ubuntu/dists/maverick/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64/ などにあるlinux, initrd.gzは同じ
  • ​http://jp.archive.ubuntu.com/ubuntu/dists/maverick/main/installer-amd64/current/images/netboot/mini.iso > linux, initrd.gz
  • ​http://jp.archive.ubuntu.com/ubuntu/dists/maverick/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64/linux
  • ​http://jp.archive.ubuntu.com/ubuntu/dists/maverick/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64/initrd.gz
  • initrd.gzに関しては中身は同じ
  • pxelinux.cfg等はパスが異なる

GRUB2

reduce grub entry

• WindowsとLinuxのマルチブート -> Windowsを消してシングルブート化

1. 元の状態
   • fdisk -lu /dev/sda

     Disk /dev/sda: 120.0 GB, 120034123776 bytes
     255 heads, 63 sectors/track, 14593 cylinders, total 234441648 sectors
     Units = sectors of 1 * 512 = 512 bytes
     Sector size (logical/physical): 512 bytes / 512 bytes
     I/O size (minimum/optimal): 512 bytes / 512 bytes
     Disk identifier: 0x36ea3e05
     
        Device Boot      Start         End      Blocks   Id  System
     /dev/sda1              63      524351      262144+  82  Linux swap / Solaris
     Partition 1 does not end on cylinder boundary.
     /dev/sda2          524352    42467392    20971520+   7  HPFS/NTFS
     /dev/sda3        42467393   234441647    95987127+  83  Linux
     

   • OSのインストールは、Windows 7 -> Ubuntu 10.04の順
   • grep menuentry /boot/grub/grub.cfg | tr \" \' | cut -d\' -f2

     Ubuntu, with Linux 2.6.32-33-generic
     Ubuntu, with Linux 2.6.32-33-generic (recovery mode)
     Ubuntu, with Linux 2.6.32-32-generic
     Ubuntu, with Linux 2.6.32-32-generic (recovery mode)
     Ubuntu, with Linux 2.6.32-31-generic
     Ubuntu, with Linux 2.6.32-31-generic (recovery mode)
     Memory test (memtest86+)
     Memory test (memtest86+, serial console 115200)
     Windows 7 (loader) (on /dev/sda2)
     

2. NTFSパーティションの削除
   • root@Microknoppix:~# fdisk /dev/sdb

        Device Boot      Start         End      Blocks   Id  System
     /dev/sdb1               1          33      262144+  82  Linux swap / Solaris
     Partition 1 does not end on cylinder boundary.
     /dev/sdb2   *          33        2644    20971520+   7  HPFS/NTFS
     /dev/sdb3            2644       14594    95987127+  83  Linux
     
     Command (m for help): d
     Partition number (1-4): 2
     
     Command (m for help): d
     Partition number (1-4): 3
     
     Command (m for help): n
     Command action
        e   extended
        p   primary partition (1-4)
     p
     Partition number (1-4): 2
     First cylinder (33-14593, default 33):
     Using default value 33
     Last cylinder, +cylinders or +size{K,M,G} (33-14593, default 14593):
     Using default value 14593
     
     Command (m for help): w
     

        Device Boot      Start         End      Blocks   Id  System
     /dev/sdb1              63      524351      262144+  82  Linux swap / Solaris
     Partition 1 does not end on cylinder boundary.
     /dev/sdb2          524352   234436544   116956096+  83  Linux
     

3. backupしておいたdisk imageからLinuxパーティションを書き戻し
   • root@Microknoppix:~# dd if=/media/sda/bb.sda bs=512 skip=42467393 of=/dev/sdb2

     191974255+0 records in
     191974255+0 records out
     98290818560 bytes (98 GB) copied, 3223.76 s, 30.5 MB/s