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HOME > ½Ã½ºÅÛ °ü¸® / ¼­¹ö¿î¿µ > ºÎÆÃ, boot / LILO / GRUB µµ¿ò¸»
°Ë»ö : »çÀÌÆ® WHOIS À¥¼­¹ö Á¾·ù


  grub¿¡¼­ Ä¿³Î ÆдР´ëóÇÏ´Â ºÎÆà ¼³Á¤ ÀÛ¼ºÀÏ : 2010/01/21 00:08
 
  • ±Û¾´ÀÌ : ÁÁÀºÁøÈ£ ( http://coffeenix.net/ )
  • Á¶È¸¼ö : 14846
          [ ÀÌÀüÈ­¸é / ¼öÁ¤ ]   ºñ¹Ð¹øÈ£ :     Àμâ¿ë È­¸é
      Á¦  ¸ñ : grub¿¡¼­ Ä¿³Î ÆдР´ëóÇÏ´Â ºÎÆà ¼³Á¤
    ÀÛ¼ºÀÚ : ÁÁÀºÁøÈ£(truefeel, http://coffeenix.net/ )
    ÀÛ¼ºÀÏ : 2010.1.20(¼ö)

    »õ·Î¿î Ä¿³ÎÀ» ¾÷±×·¹À̵å ÇÑ ÈÄ, ¸®ºÎÆýà Ŀ³Î ÆдÐ(kernel panic)ÀÌ ¹ß»ýÇÒ ¼öµµ ÀÖ´Ù. Äֿܼ¡¼­ Á÷Á¢ ºÎÆÃÇÏ´Â °ÍÀ̶ó¸é Æднà ÀÌÀü Ä¿³Î·Î ºÎÆÃÇÏ´Â °ÍÀº ½±°ÔÇÒ ¼ö ÀÖ´Ù. ±×·¯³ª ¿ø°Ý¿¡¼­ ¸®ºÎÆýà ÆдÐÀÌ ¹ß»ýÇß´Ù¸é ´õÀÌ»óÀÇ Á¶Ä¡´Â ÃëÇϱ⠾î·Æ´Ù.
    ÇÏÁö¸¸ ÆдÐÀÌ ¹ß»ýÇÒ ¶§ ¾ÈÀüÇÏ°Ô ÀÌÀü Ä¿³Î·Î ºÎÆÃÇϵµ·Ï GRUB¿¡¼­ ¼³Á¤ÇÒ ¼ö ÀÖ´Ù. CentOS¿Í Ubuntu°£¿¡ GRUB ¼³Á¤¿¡ Â÷ÀÌ°¡ À־, 2°¡Áö ¹æ¹ýÀ¸·Î ¼³¸íÇÏ°Ú´Ù.

    ´ÙÀ½Àº /boot/grub/grub.confÀÇ ¼³Á¤ ¿¹ÀÌ´Ù. default=0 À¸·Î ¼³Á¤µÇ¾î ÀÖÀ¸¹Ç·Î ù¹ø°¿¡ ÀÖ´Â 2.6.18-oldÀÇ Ä¿³Î·Î ºÎÆõȴÙ. »õ·Î ¼³Ä¡ÇÑ 2.6.18-new·Î ¾ÈÀüÇÏ°Ô ºÎÆÃÇÏ·Á¸é ¾î¶»°Ô ÇؾßÇÒ±î?

     
    default=0
    timeout=3
    splashimage=(hd0,0)/grub/splash.xpm.gz
    hiddenmenu
    title CentOS (2.6.18-old)
    ¡¡¡¡¡¡root (hd0,0)
    ¡¡¡¡¡¡kernel /vmlinuz-2.6.18-old ro root=LABEL=/
    ¡¡¡¡¡¡initrd /initrd-2.6.18-old.img
    title CentOS (2.6.18-new)
    ¡¡¡¡¡¡root (hd0,0)
    ¡¡¡¡¡¡kernel /vmlinuz-2.6.18-new ro root=LABEL=/
    ¡¡¡¡¡¡initrd /initrd-2.6.18-new.img
     



    1. ¹æ¹ý 1 (CentOS, RHELÀÇ °æ¿ì)

    grub command ½©¿¡¼­ ´ÙÀ½°ú °°ÀÌ °á°ú°¡ ³ª¿Ã °æ¿ì, ÀÌ ¼³Á¤¹ýÀ» ÀÌ¿ëÇÏ¸é µÈ´Ù.

     
    grub> help savedefault
    savedefault: savedefault [--stage2=STAGE2_FILE] [--default=DEFAULT] [--once]
        Save DEFAULT as the default boot entry in STAGE2_FILE. If
        '--once' is specified, the default is reset after the next reboot.
     


    grub.conf¿¡¼­ panic=3 ¼³Á¤À» Ãß°¡ÇÑ´Ù. Ä¿³Î Æднà 3ÃÊ µÚ¿¡ ¸®ºÎÆÃÇ϶ó´Â °ÍÀÌ´Ù.
     
    ... »ý·« ...
    ¡¡¡¡¡¡kernel /vmlinuz-2.6.18-new ro root=LABEL=/ panic=3
     


    ÀÌÁ¦ ¸í·É¾î ÇÑÁÙÀÌ¸é ³¡³­´Ù.

     
    # echo "savedefault --default=1 --once" | grub --batch

    ¶Ç´Â grub command ½©¿¡¼­ savedefault ¸í·ÉÀ» ³»¸°´Ù.
    # grub
    grub> savedefault --default=1 --once
    grub> quit
     


    --default=1 : 2¹ø° Ä¿³Î(À§¿¡¼­´Â 2.6.18-new)·Î ºÎÆÃÇ϶ó´Â ¶æÀÌ´Ù. ÀÌ ¶§ ÆдÐÀÌ ¹ß»ýÇϸé grub.conf¿¡ ¼³Á¤µÈ default=0ÀÇ Ä¿³Î·Î ÀÚµ¿ ¸®ºÎÆÃÀ» ÇÏ°Ô µÈ´Ù. Áï, ¹®Á¦°¡ ¹ß»ýÇصµ ÀÌÀü¹öÀüÀ¸·Î ºÎÆÃµÇ´Ï ¾ÈÀüÇÏ´Ù. 3¹ø° Ä¿³Î·Î ÇÏ°í ½Í´Ù¸é --default=2¶ó°í ÇÏ¸é µÈ´Ù.
    --once      : µü Çѹø¸¸ 2¹ø° Ä¿³Î·Î ºÎÆÃÇ϶ó´Â ¶æÀÌ´Ù. ´ÙÀ½ ºÎÆö§ºÎÅÍ´Â ¿ø·¡´ë·Î grub.conf¼³Á¤À» µû¸¥´Ù.

    »õ·Î¿î Ä¿³Î·Î Á¤»ó ºÎÆÃÀÌ µÇ¾ú´Ù¸é grub.conf¿¡¼­ default= ¼³Á¤ µîÀ» º¯°æÇؼ­, ºÎÆÃÇÒ ¶§¸¶´Ù »õÄ¿³Î·Î ºÎÆõǵµ·Ï ¼öÁ¤ÇØÁÖ¸é µÉ °ÍÀÌ´Ù.


    2. ¹æ¹ý 2 (¿ìºÐÅõ(Ubuntu)ÀÇ °æ¿ì)

    grub command ½©¿¡¼­ ´ÙÀ½°ú °°ÀÌ °á°ú°¡ ³ª¿Ã °æ¿ì, ÀÌ ¼³Á¤¹ýÀ» ÀÌ¿ëÇÏ¸é µÈ´Ù. ÀÌ ¶§ grub-set-default ½ÇÇà ÆÄÀÏÀÌ /usr/sbin µî¿¡ Á¸ÀçÇÒ °ÍÀÌ´Ù.

     
    grub> help savedefault
    savedefault: savedefault [NUM | `fallback']
        Save the current entry as the default boot entry if no argument
        is specified. If a number is specified, this number is saved. If
        `fallback' is used, next fallback entry is saved.
     


    grub.conf ¼³Á¤À» ´ÙÀ½°ú °°ÀÌ ¹Ù²Û´Ù.

     
    default saved
    timeout=3
    splashimage=(hd0,0)/grub/splash.xpm.gz
    hiddenmenu
    title CentOS (2.6.18-old)
    ¡¡¡¡¡¡root (hd0,0)
    ¡¡¡¡¡¡kernel /vmlinuz-2.6.18-old ro root=LABEL=/
    ¡¡¡¡¡¡initrd /initrd-2.6.18-old.img
    ¡¡¡¡¡¡savedefault
    title CentOS (2.6.18-new)
    ¡¡¡¡¡¡root (hd0,0)
    ¡¡¡¡¡¡kernel /vmlinuz-2.6.18-new ro root=LABEL=/ panic=3
    ¡¡¡¡¡¡initrd /initrd-2.6.18-new.img
    ¡¡¡¡¡¡savedefault 0
     


    default saved·Î ¼³Á¤Çϸé grubÀº /boot/grub/default ÅؽºÆ® ÆÄÀÏ¿¡ ¼³Á¤ÇÑ Ä¿³Î ¹øÈ£(entry)¸¦ ¸ÕÀú ½ÇÇàÇÑ´Ù. ÀÌ ÆÄÀϳ»¿¡ 1À̶ó°í µÇ¾î ÀÖ´Ù¸é 2.6.18-new Ä¿³Î·Î ¸ÕÀú ºÎÆõȴÙ. 2.6.18-new Ä¿³Î ºÎºÐ¿¡´Â 'savedefault 0'¼³Á¤ÀÌ ÀÖ´Ù. ÀÌ´Â 2.6.18-new·Î ¸ÕÀú ºÎÆÃÀ» ÇÏ°í, ´ÙÀ½ ºÎÆÃÇÒ ¶§´Â ù¹ø°(savedefault 0 ¼³Á¤¿¡ µû¸¥ °ÍÀÓ)¿¡ ÀÖ´Â 2.6.18-old·Î ºÎÆÃÇ϶ó´Â °ÍÀÌ´Ù.

    /boot/grub/default ÆÄÀÏÀº Á÷Á¢ÀûÀ¸·Î ¼öÁ¤ÇÏÁö ¸»°í, grub-set-default ¸í·ÉÀ¸·Î º¯°æÇÏ´Â °ÍÀ» ±ÇÀåÇÏ°í ÀÖ´Ù. ´ÙÀ½°ú °°ÀÌ ½ÇÇàÇØÁÖ¸é µÈ´Ù.

     
    # grub-set-default 1
    # cat /boot/grub/default
    1
    #
    #
    #
    #
    #
    #
    #
    #
    #
    #
    # WARNING: If you want to edit this file directly, do not remove any line
    # from this file, including this warning. Using `grub-set-default\' is
    # strongly recommended.
     


    3. Ä¿³Î 3°³ ÀÌ»óÀÏ ¶§ fallback ¼³Á¤(¹æ¹ý 2, ¿ìºÐÅõ(Ubuntu)ÀÇ °æ¿ì)

    ÀÌ ºÎºÐÀº Á» ´õ ±íÀÌ ÀÌÇØÇϱâ À§ÇÑ ºÎºÐÀ¸·Î ¸ð¸£°í ³Ñ¾î°¡µµ »ó°ü¾ø´Ù. Ä¿³ÎÀÌ 2°³ º¸´Ù ¸¹À» °æ¿ì °æ¿ì fallback ¼³Á¤À¸·Î ¼øÂ÷ÀûÀ¸·Î »õ·Î¿î Ä¿³Î·Î ºÎÆõǵµ·Ï ÇÒ ¼ö°¡ ÀÖ´Ù. ´ÙÀ½Àº GRUB ¸Å´º¾ó¿¡ ³ª¿Â ¿¹Á¦ÀÌ´Ù.

     
    default saved        # This is important!!!
    timeout 10
    fallback 1 2         # This is important!!!
        
    title A
    root (hd0,0)
    kernel /kernel
    savedefault fallback # This is important!!!
        
    title B
    root (hd1,0)
    kernel /kernel
    savedefault fallback # This is important!!!
        
    title C
    root (hd2,0)
    kernel /kernel
    savedefault
     


    fallback 1 2 ¼³Á¤Àº /boot/grub/default ¿¡ ¼³Á¤µÈ Ä¿³Î ¹øÈ£·Î ºÎÆÃÀ» ¸ÕÀú ÇÏ°í, ±× ´ÙÀ½¿¡´Â 1¹ø, ±× ´ÙÀ½¿¡´Â 2¹ø Ä¿³Î·Î ºÎÆÃÇ϶ó´Â ¶æÀÌ´Ù. µû¶ó¼­ /boot/grub/default ¿¡ 0ÀÌ µé¾î°¡ ÀÖ´Ù¸é A -> B -> C Ä¿³Î ¼øÀ¸·Î ¼øÂ÷ÀûÀ¸·Î ºÎÆÃÀ» ÇÏ°Ô µÈ´Ù.

    ¸¸¾à ù¹ø° ÀÖ´Â AÄ¿³Î·Î Á¤»ó ºÎÆÃÀÌ µÇ¾ú°í, ÀÌÁ¦ ¸Å¹ø AÄ¿³Î·Î ºÎÆÃÀ» ¿øÇÑ´Ù¸é rc.local¿¡ 'grub-set-default 0'À» ³Ö¾îÁÖ¸é µÈ´Ù. fallback ±â´É¿¡ ´ëÇؼ­´Â http://star4u.org/blog/?p=88 ¿¡ ÀÚ¼¼È÷ ¼³¸íµÇ¾î ÀÖ´Ù.


    4. Âü°íÀÚ·á

    1) lilo¿¡¼­ Ä¿³Î ÆдР´ëó¹ý

      - lilo ¸¦ ÀÌ¿ëÇÑ ºÎÆà ½ÇÆÐ ´ëó.... (±Û mindline, 2003.11 )
        http://coffeenix.net/board_view.php?bd_code=137


    2) grubÀÇ savedefault --default=1 --once ¸í·ÉÀ¸·Î ¼³Á¤ÇÏ´Â ¹æ¹ý

      - grub single boot and kernel panic reboot
        http://www.linux-noob.com/forums/index.php?/topic/2928-grub-single-boot-and-kernel-panic-reboot/
      - grub-set-default
        http://www.centos.org/modules/newbb/viewtopic.php?viewmode=flat&topic_id=3931&forum=27
      - GRUB bootsÀÇ Fallbacks
        http://fedora.redhatmagazine.com/magazine/024oct06/features/kickstart/?intcmp=bcm_edmsept_007

    3) grub-set-default ¸í·ÉÀ¸·Î ¼³Á¤ÇÏ´Â ¹æ¹ý

      - GRUB ¸Å´º¾óÀÇ '4.3.1 Booting once-only'°ú '4.3.2 Booting fallback systems'
        http://www.gnu.org/software/grub/manual/grub.html#Booting-once_002donly
      - GRUBÀÇ fallback±â´ÉÀ¸·Î ¾ÈÀüÇÏ°Ô Ä¿³Î ¾÷±×·¹À̵å Çϱâ
        http://star4u.org/blog/?p=88

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