ubuntu更改grub2默认启动顺序
2015-05-28 08:12
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安装windows/ubuntu之后,默认情况下是启动ubuntu,但是由于近期大部分工作要在windows下面做,所以需要改一下启动顺序,让grub2默认启动windows
笔者ubuntu系统为ubuntu14.04,使用grub2引导,与grub1修改方法可能不一致。这里只讲grub2的修改
原理:修改grub的配置文件/boot/grub/grub.cfg里面的一行set default="0"改为set default="4"即可,数字对应启动第几项,默认0对应第一项,4对应第五项
命令如下:
![](http://img.blog.csdn.net/20150528080547724?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZ3NsczIwMDgwOA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center)
![](http://img.blog.csdn.net/20150528080433974?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvZ3NsczIwMDgwOA==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center)
笔者更改后的完整grub.cfg文件如下,请勿直接使用此文件替换
由于每次ubuntu系统更新会执行update-grub2命令,执行之后,默认的启动顺序会还原到ubuntu,所以更新之后需要再次执行上述步骤更改
笔者ubuntu系统为ubuntu14.04,使用grub2引导,与grub1修改方法可能不一致。这里只讲grub2的修改
原理:修改grub的配置文件/boot/grub/grub.cfg里面的一行set default="0"改为set default="4"即可,数字对应启动第几项,默认0对应第一项,4对应第五项
命令如下:
ls /boot/grub/ sudo gedit /boot/grub/grub.cfg
hadoop@Lenovo-B470:~$ ls /boot/grub/ fonts grub.cfg grubenv locale gfxblacklist.txt grub.cfg~ i386-pc unicode.pf2 hadoop@Lenovo-B470:~$ sudo gedit /boot/grub/grub.cfg [sudo] password for hadoop: (gedit:4494): IBUS-WARNING **: The owner of /home/hadoop/.config/ibus/bus is not root! (gedit:4494): Gtk-WARNING **: Calling Inhibit failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files (gedit:4494): Gtk-WARNING **: Calling Inhibit failed: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files在打开的窗口中Ctrl+F 查找set default字符串,笔者找到两项,将其中的set default="0"改为set default="4"
笔者更改后的完整grub.cfg文件如下,请勿直接使用此文件替换
# # DO NOT EDIT THIS FILE # # It is automatically generated by grub-mkconfig using templates # from /etc/grub.d and settings from /etc/default/grub # ### BEGIN /etc/grub.d/00_header ### if [ -s $prefix/grubenv ]; then set have_grubenv=true load_env fi if [ "${next_entry}" ] ; then set default="${next_entry}" set next_entry= save_env next_entry set boot_once=true else set default="4" fi if [ x"${feature_menuentry_id}" = xy ]; then menuentry_id_option="--id" else menuentry_id_option="" fi export menuentry_id_option if [ "${prev_saved_entry}" ]; then set saved_entry="${prev_saved_entry}" save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=true fi function savedefault { if [ -z "${boot_once}" ]; then saved_entry="${chosen}" save_env saved_entry fi } function recordfail { set recordfail=1 if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi } function load_video { if [ x$feature_all_video_module = xy ]; then insmod all_video else insmod efi_gop insmod efi_uga insmod ieee1275_fb insmod vbe insmod vga insmod video_bochs insmod video_cirrus fi } if [ x$feature_default_font_path = xy ] ; then font=unicode else insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 30b73627-093c-4079-baca-e1a0618ad51a else search --no-floppy --fs-uuid --set=root 30b73627-093c-4079-baca-e1a0618ad51a fi font="/usr/share/grub/unicode.pf2" fi if loadfont $font ; then set gfxmode=auto load_video insmod gfxterm set locale_dir=$prefix/locale set lang=zh_CN insmod gettext fi terminal_output gfxterm if [ "${recordfail}" = 1 ] ; then set timeout=-1 else if [ x$feature_timeout_style = xy ] ; then set timeout_style=menu set timeout=10 # Fallback normal timeout code in case the timeout_style feature is # unavailable. else set timeout=10 fi fi ### END /etc/grub.d/00_header ### ### BEGIN /etc/grub.d/05_debian_theme ### set menu_color_normal=white/black set menu_color_highlight=black/light-gray if background_color 44,0,30,0; then clear fi ### END /etc/grub.d/05_debian_theme ### ### BEGIN /etc/grub.d/10_linux ### function gfxmode { set gfxpayload="${1}" if [ "${1}" = "keep" ]; then set vt_handoff=vt.handoff=7 else set vt_handoff= fi } if [ "${recordfail}" != 1 ]; then if [ -e ${prefix}/gfxblacklist.txt ]; then if hwmatch ${prefix}/gfxblacklist.txt 3; then if [ ${match} = 0 ]; then set linux_gfx_mode=keep else set linux_gfx_mode=text fi else set linux_gfx_mode=text fi else set linux_gfx_mode=keep fi else set linux_gfx_mode=text fi export linux_gfx_mode menuentry 'Ubuntu' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-30b73627-093c-4079-baca-e1a0618ad51a' { recordfail load_video gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 30b73627-093c-4079-baca-e1a0618ad51a else search --no-floppy --fs-uuid --set=root 30b73627-093c-4079-baca-e1a0618ad51a fi linux /boot/vmlinuz-3.13.0-46-generic root=UUID=30b73627-093c-4079-baca-e1a0618ad51a ro quiet splash $vt_handoff initrd /boot/initrd.img-3.13.0-46-generic } submenu 'Ubuntu 高级选项' $menuentry_id_option 'gnulinux-advanced-30b73627-093c-4079-baca-e1a0618ad51a' { menuentry 'Ubuntu,Linux 3.13.0-46-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-46-generic-advanced-30b73627-093c-4079-baca-e1a0618ad51a' { recordfail load_video gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 30b73627-093c-4079-baca-e1a0618ad51a else search --no-floppy --fs-uuid --set=root 30b73627-093c-4079-baca-e1a0618ad51a fi echo '载入 Linux 3.13.0-46-generic ...' linux /boot/vmlinuz-3.13.0-46-generic root=UUID=30b73627-093c-4079-baca-e1a0618ad51a ro quiet splash $vt_handoff echo '载入初始化内存盘...' initrd /boot/initrd.img-3.13.0-46-generic } menuentry 'Ubuntu, with Linux 3.13.0-46-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-46-generic-recovery-30b73627-093c-4079-baca-e1a0618ad51a' { recordfail load_video insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 30b73627-093c-4079-baca-e1a0618ad51a else search --no-floppy --fs-uuid --set=root 30b73627-093c-4079-baca-e1a0618ad51a fi echo '载入 Linux 3.13.0-46-generic ...' linux /boot/vmlinuz-3.13.0-46-generic root=UUID=30b73627-093c-4079-baca-e1a0618ad51a ro recovery nomodeset echo '载入初始化内存盘...' initrd /boot/initrd.img-3.13.0-46-generic } menuentry 'Ubuntu,Linux 3.13.0-45-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-45-generic-advanced-30b73627-093c-4079-baca-e1a0618ad51a' { recordfail load_video gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 30b73627-093c-4079-baca-e1a0618ad51a else search --no-floppy --fs-uuid --set=root 30b73627-093c-4079-baca-e1a0618ad51a fi echo '载入 Linux 3.13.0-45-generic ...' linux /boot/vmlinuz-3.13.0-45-generic root=UUID=30b73627-093c-4079-baca-e1a0618ad51a ro quiet splash $vt_handoff echo '载入初始化内存盘...' initrd /boot/initrd.img-3.13.0-45-generic } menuentry 'Ubuntu, with Linux 3.13.0-45-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-45-generic-recovery-30b73627-093c-4079-baca-e1a0618ad51a' { recordfail load_video insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 30b73627-093c-4079-baca-e1a0618ad51a else search --no-floppy --fs-uuid --set=root 30b73627-093c-4079-baca-e1a0618ad51a fi echo '载入 Linux 3.13.0-45-generic ...' linux /boot/vmlinuz-3.13.0-45-generic root=UUID=30b73627-093c-4079-baca-e1a0618ad51a ro recovery nomodeset echo '载入初始化内存盘...' initrd /boot/initrd.img-3.13.0-45-generic } menuentry 'Ubuntu,Linux 3.13.0-40-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-40-generic-advanced-30b73627-093c-4079-baca-e1a0618ad51a' { recordfail load_video gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 30b73627-093c-4079-baca-e1a0618ad51a else search --no-floppy --fs-uuid --set=root 30b73627-093c-4079-baca-e1a0618ad51a fi echo '载入 Linux 3.13.0-40-generic ...' linux /boot/vmlinuz-3.13.0-40-generic root=UUID=30b73627-093c-4079-baca-e1a0618ad51a ro quiet splash $vt_handoff echo '载入初始化内存盘...' initrd /boot/initrd.img-3.13.0-40-generic } menuentry 'Ubuntu, with Linux 3.13.0-40-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-40-generic-recovery-30b73627-093c-4079-baca-e1a0618ad51a' { recordfail load_video insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 30b73627-093c-4079-baca-e1a0618ad51a else search --no-floppy --fs-uuid --set=root 30b73627-093c-4079-baca-e1a0618ad51a fi echo '载入 Linux 3.13.0-40-generic ...' linux /boot/vmlinuz-3.13.0-40-generic root=UUID=30b73627-093c-4079-baca-e1a0618ad51a ro recovery nomodeset echo '载入初始化内存盘...' initrd /boot/initrd.img-3.13.0-40-generic } menuentry 'Ubuntu,Linux 3.13.0-35-generic' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-35-generic-advanced-30b73627-093c-4079-baca-e1a0618ad51a' { recordfail load_video gfxmode $linux_gfx_mode insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 30b73627-093c-4079-baca-e1a0618ad51a else search --no-floppy --fs-uuid --set=root 30b73627-093c-4079-baca-e1a0618ad51a fi echo '载入 Linux 3.13.0-35-generic ...' linux /boot/vmlinuz-3.13.0-35-generic root=UUID=30b73627-093c-4079-baca-e1a0618ad51a ro quiet splash $vt_handoff echo '载入初始化内存盘...' initrd /boot/initrd.img-3.13.0-35-generic } menuentry 'Ubuntu, with Linux 3.13.0-35-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.0-35-generic-recovery-30b73627-093c-4079-baca-e1a0618ad51a' { recordfail load_video insmod gzio insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 30b73627-093c-4079-baca-e1a0618ad51a else search --no-floppy --fs-uuid --set=root 30b73627-093c-4079-baca-e1a0618ad51a fi echo '载入 Linux 3.13.0-35-generic ...' linux /boot/vmlinuz-3.13.0-35-generic root=UUID=30b73627-093c-4079-baca-e1a0618ad51a ro recovery nomodeset echo '载入初始化内存盘...' initrd /boot/initrd.img-3.13.0-35-generic } } ### END /etc/grub.d/10_linux ### ### BEGIN /etc/grub.d/20_linux_xen ### ### END /etc/grub.d/20_linux_xen ### ### BEGIN /etc/grub.d/20_memtest86+ ### menuentry 'Memory test (memtest86+)' { insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 30b73627-093c-4079-baca-e1a0618ad51a else search --no-floppy --fs-uuid --set=root 30b73627-093c-4079-baca-e1a0618ad51a fi knetbsd /boot/memtest86+.elf } menuentry 'Memory test (memtest86+, serial console 115200)' { insmod part_msdos insmod ext2 set root='hd0,msdos8' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos8 --hint-efi=hd0,msdos8 --hint-baremetal=ahci0,msdos8 30b73627-093c-4079-baca-e1a0618ad51a else search --no-floppy --fs-uuid --set=root 30b73627-093c-4079-baca-e1a0618ad51a fi linux16 /boot/memtest86+.bin console=ttyS0,115200n8 } ### END /etc/grub.d/20_memtest86+ ### ### BEGIN /etc/grub.d/30_os-prober ### menuentry 'Windows Vista (loader) (on /dev/sda1)' --class windows --class os $menuentry_id_option 'osprober-chain-FA1CAF751CAF2C17' { insmod part_msdos insmod ntfs set root='hd0,msdos1' if [ x$feature_platform_search_hint = xy ]; then search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1 FA1CAF751CAF2C17 else search --no-floppy --fs-uuid --set=root FA1CAF751CAF2C17 fi parttool ${root} hidden- chainloader +1 } set timeout_style=menu if [ "${timeout}" = 0 ]; then set timeout=10 fi ### END /etc/grub.d/30_os-prober ### ### BEGIN /etc/grub.d/30_uefi-firmware ### ### END /etc/grub.d/30_uefi-firmware ### ### BEGIN /etc/grub.d/40_custom ### # This file provides an easy way to add custom menu entries. Simply type the # menu entries you want to add after this comment. Be careful not to change # the 'exec tail' line above. ### END /etc/grub.d/40_custom ### ### BEGIN /etc/grub.d/41_custom ### if [ -f ${config_directory}/custom.cfg ]; then source ${config_directory}/custom.cfg elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then source $prefix/custom.cfg; fi ### END /etc/grub.d/41_custom ###
由于每次ubuntu系统更新会执行update-grub2命令,执行之后,默认的启动顺序会还原到ubuntu,所以更新之后需要再次执行上述步骤更改
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