Grub Setting on Ubuntu 9.10 Karmic Koala

GRand Unified Bootloader it is the software responsible for loading and transferring control to the operating system kernel during the initial boot. On the Koala Karmic is using GRUB version 2. On this version there is a bit different on file configuration. On last version, all of the GRUB configuration can we see on file ‘/boot/grub/menu.list’. On this version, the configuration file is on this path :



vmlinuz@linuz:~$ sudo gedit /etc/default/grub

`01`	`# If you change this file, run 'update-grub' afterwards to update`

`02`	`# /boot/grub/grub.cfg.`

03

`04`	`GRUB_DEFAULT=0`

`05`	`#GRUB_HIDDEN_TIMEOUT=10`

`06`	`#GRUB_HIDDEN_TIMEOUT_QUIET=true`

`07`	`GRUB_TIMEOUT="10"`

`08`	GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null \|\| `echo` Debian`

`09`	`GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"`

`10`	`GRUB_CMDLINE_LINUX=""`

11

`12`	`# Uncomment to disable graphical terminal (grub-pc only)`

`13`	`#GRUB_TERMINAL=console`

14

`15`	`# The resolution used on graphical terminal`

`16`	`# note that you can use only modes which your graphic card supports via VBE`

`17`	# you can see them in real GRUB with the command `vbeinfo'

`18`	`#GRUB_GFXMODE=640x480`

19

`20`	`# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux`

`21`	`#GRUB_DISABLE_LINUX_UUID=true`

22

`23`	`# Uncomment to disable generation of recovery mode menu entrys`

`24`	`#GRUB_DISABLE_LINUX_RECOVERY="true"`

This file contain GRUB setting variable. You can make any change setting of this variable to make the GRUB running as you want. Beware that after you editing this file, you must running the update-grub syntax on console to update the GRUB setting.

If you want to change the list of the Boot Menu, you can edit on this path :

vmlinuz@linuz:~$ sudo gedit /boot/grub/grub.cfg

01 #

`02`	`# DO NOT EDIT THIS FILE`

03 #

`04`	`# It is automatically generated by /usr/sbin/grub-mkconfig using templates`

`05`	`# from /etc/grub.d and settings from /etc/default/grub`

06 #

07

`08`	`### BEGIN /etc/grub.d/00_header ###`

`09`	`if` `[ -s /boot/grub/grubenv ];` `then`

`10`	`have_grubenv=true`

`11`	`load_env`

12 fi

`13`	`set` `default="0"`

`14`	`if` `[ ${prev_saved_entry} ];` `then`

`15`	`saved_entry=${prev_saved_entry}`

`16`	`save_env saved_entry`

`17`	`prev_saved_entry=`

`18`	`save_env prev_saved_entry`

19 fi

`20`	`insmod ext2`

`21`	`set` `root=(hd0,1)`

`22`	`search --no-floppy --fs-uuid --set` `15ed4e71-1d78-4ed8-9855-3b3771861ce9`

`23`	`if` `loadfont /usr/share/grub/unicode.pf2 ;` `then`

`24`	`set` `gfxmode=640x480`

`25`	`insmod gfxterm`

`26`	`insmod vbe`

`27`	`if` `terminal_output gfxterm ;` `then` `true` `;` `else`

`28`	`# For backward compatibility with versions of terminal.mod that don't`

`29`	`# understand terminal_output`

`30`	`terminal gfxterm`

31 fi

32 fi

`33`	`if` `[ ${recordfail} = 1 ];` `then`

`34`	`set` `timeout=-1`

35 else

`36`	`set` `timeout=3`

37 fi

`38`	`### END /etc/grub.d/00_header ###`

39

`40`	`### BEGIN /etc/grub.d/05_debian_theme ###`

`41`	`set` `menu_color_normal=white/black`

`42`	`set` `menu_color_highlight=black/white`

`43`	`### END /etc/grub.d/05_debian_theme ###`

44

`45`	`### BEGIN /etc/grub.d/10_linux ###`

`46`	`menuentry` `"Ubuntu, Linux 2.6.31-14-generic"` `{`

`47`	`recordfail=1`

`48`	`if` `[ -n ${have_grubenv} ];` `then` `save_env recordfail;` `fi`

`49`	`set` `quiet=1`

`50`	`insmod ext2`

`51`	`set` `root=(hd0,1)`

`52`	`search --no-floppy --fs-uuid --set` `15ed4e71-1d78-4ed8-9855-3b3771861ce9`

`53`	`linux /boot/vmlinuz-2.6.31-14-generic root=UUID=15ed4e71-1d78-4ed8-9855-3b3771861ce9 ro quiet splash`

`54`	`initrd /boot/initrd.img-2.6.31-14-generic`

55 }

`56`	`menuentry` `"Ubuntu, Linux 2.6.31-14-generic (recovery mode)"` `{`

`57`	`recordfail=1`

`58`	`if` `[ -n ${have_grubenv} ];` `then` `save_env recordfail;` `fi`

`59`	`insmod ext2`

`60`	`set` `root=(hd0,1)`

`61`	`search --no-floppy --fs-uuid --set` `15ed4e71-1d78-4ed8-9855-3b3771861ce9`

`62`	`linux /boot/vmlinuz-2.6.31-14-generic root=UUID=15ed4e71-1d78-4ed8-9855-3b3771861ce9 ro single`

`63`	`initrd /boot/initrd.img-2.6.31-14-generic`

64 }

`65`	`### END /etc/grub.d/10_linux ###`

66

`67`	`### BEGIN /etc/grub.d/20_memtest86+ ###`

`68`	`menuentry` `"Memory test (memtest86+)"` `{`

`69`	`linux16 /boot/memtest86+.bin`

70 }

`71`	`menuentry` `"Memory test (memtest86+, serial console 115200)"` `{`

`72`	`linux16 /boot/memtest86+.bin console=ttyS0,115200n8`

73 }

`74`	`### END /etc/grub.d/20_memtest86+ ###`

75

`76`	`### BEGIN /etc/grub.d/30_os-prober ###`

`77`	`menuentry` `"Windows Vista (loader) (on /dev/sda2)"` `{`

`78`	`insmod ntfs`

`79`	`set` `root=(hd0,2)`

`80`	`search --no-floppy --fs-uuid --set` `5220fd0220fcedbb`

`81`	`chainloader +1`

82 }

`83`	`if` `[ ${timeout} != -1 ];` `then`

`84`	`if` `sleep` `--interruptible 3 ;` `then`

`85`	`set` `timeout=0`

86 fi

87 fi

`88`	`### END /etc/grub.d/30_os-prober ###`

89

`90`	`### BEGIN /etc/grub.d/40_custom ###`

`91`	`# This file provides an easy way to add custom menu entries. Simply type the`

`92`	`# menu entries you want to add after this comment. Be careful not to change`

`93`	`# the 'exec tail' line above.`

`94`	`### END /etc/grub.d/40_custom ###`

If you want to hide the boot menu on GRUB 2, you must do little more things like this one.

vmlinuz@linuz:~$ sudo gedit /etc/grub.d/30_os-prober

`27`	`adjust_timeout () {`

`28`	`if` `[` `"x${found_other_os}"` `=` `"x"` `] ;` `then`

`29`	`if` `[` `"x${GRUB_HIDDEN_TIMEOUT}"` `!=` `"x"` `] ;` `then`

`30`	`if` `[` `"x${GRUB_HIDDEN_TIMEOUT_QUIET}"` `=` `"xtrue"` `] ;` `then`

`31`	`verbose=`

32 else

`33`	`verbose=" --verbose"`

34 fi

35

`36`	`if` `[` `"x${GRUB_HIDDEN_TIMEOUT}"` `=` `"x0"` `] ;` `then`

`37`	`cat` `<<EOF`

`38`	`if` `[ \${timeout} != -1 ];` `then`

`39`	`if` `keystatus;` `then`

`40`	`if` `keystatus --shift;` `then`

`41`	`set` `timeout=-1`

42 else

`43`	`set` `timeout=0`

44 fi

45 else

`46`	`if` `sleep$verbose --interruptible 3 ;` `then`

`47`	`set` `timeout=0`

48

49 fi

50 fi

51 fi

52 EOF

53 else

`54`	`cat` `<< EOF`

`55`	`if` `[ \${timeout} != -1 ];` `then`

`56`	`if` `sleep$verbose --interruptible ${GRUB_HIDDEN_TIMEOUT} ;` `then`

`57`	`set` `timeout=0`

58 fi

59 fi

60 EOF

61 fi

62 fi

63 fi

64 }

Replace the script

Post Metadata

Date

May 14th, 2010

Author

vmlinuz