windows和linux双系统,设置默认启动项.docx

windows和linux双系统，设置默认启动项在终端里输入：sudo gedit /boot/grub/grub.cfg先装windows而后装linux系统，默认启动项会非常多，执行上面的命令后，会打开一个文档，里面代码如下：-( 这些小横线是我自己加的)# DO NOT EDIT THIS FILE# It is automatically generated by /usr/sbin/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 load_envfiset default=8if $prev_saved_entry ; then set saved_entry=$prev_saved_entry save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=truefifunction savedefault if -z $boot_once ; then saved_entry=$chosen save_env saved_entry fifunction recordfail set recordfail=1 if -n $have_grubenv ; then if -z $boot_once ; then save_env recordfail; fi; fiinsmod ext2set root=(hd0,9)search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0fif loadfont /usr/share/grub/unicode.pf2 ; then set gfxmode=640x480 insmod gfxterm insmod vbe if terminal_output gfxterm ; then true ; else # For backward compatibility with versions of terminal.mod that dont # understand terminal_output terminal gfxterm fifiinsmod ext2set root=(hd0,9)search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0fset locale_dir=($root)/boot/grub/localeset lang=zhinsmod gettextif $recordfail = 1 ; then set timeout=-1elseset timeout=10fi# END /etc/grub.d/00_header # BEGIN /etc/grub.d/05_debian_theme #set menu_color_normal=white/blackset menu_color_highlight=black/light-gray# END /etc/grub.d/05_debian_theme # BEGIN /etc/grub.d/10_linux #menuentry Ubuntu, with Linux 2.6.32-31-generic -class ubuntu -class gnu-linux -class gnu -class os recordfail insmod ext2 set root=(hd0,9) search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f linux /boot/vmlinuz-2.6.32-31-generic root=UUID=fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f ro quiet splash initrd /boot/initrd.img-2.6.32-31-genericmenuentry Ubuntu, with Linux 2.6.32-31-generic (recovery mode) -class ubuntu -class gnu-linux -class gnu -class os recordfail insmod ext2 set root=(hd0,9) search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f echo Loading Linux 2.6.32-31-generic . linux /boot/vmlinuz-2.6.32-31-generic root=UUID=fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f ro single echo Loading initial ramdisk . initrd /boot/initrd.img-2.6.32-31-genericmenuentry Ubuntu, with Linux 2.6.32-30-generic -class ubuntu -class gnu-linux -class gnu -class os recordfail insmod ext2 set root=(hd0,9) search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f linux /boot/vmlinuz-2.6.32-30-generic root=UUID=fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f ro quiet splash initrd /boot/initrd.img-2.6.32-30-genericmenuentry Ubuntu, with Linux 2.6.32-30-generic (recovery mode) -class ubuntu -class gnu-linux -class gnu -class os recordfail insmod ext2 set root=(hd0,9) search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f echo Loading Linux 2.6.32-30-generic . linux /boot/vmlinuz-2.6.32-30-generic root=UUID=fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f ro single echo Loading initial ramdisk . initrd /boot/initrd.img-2.6.32-30-generic insmod ext2 set root=(hd0,9) search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f linux /boot/vmlinuz-2.6.32-24-generic root=UUID=fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f ro quiet splash initrd /boot/initrd.img-2.6.32-24-genericmenuentry Ubuntu, with Linux 2.6.32-24-generic (recovery mode) -class ubuntu -class gnu-linux -class gnu -class os recordfail insmod ext2 set root=(hd0,9) search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f echo Loading Linux 2.6.32-24-generic . linux /boot/vmlinuz-2.6.32-24-generic root=UUID=fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f ro single echo Loading initial ramdisk . initrd /boot/initrd.img-2.6.32-24-generic# END /etc/grub.d/10_linux # BEGIN /etc/grub.d/20_memtest86+ #menuentry Memory test (memtest86+) insmod ext2 set root=(hd0,9) search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f linux16 /boot/memtest86+.binmenuentry Memory test (memtest86+, serial console 115200) insmod ext2 set root=(hd0,9) search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f linux16 /boot/memtest86+.bin console=ttyS0,115200n8# END /etc/grub.d/20_memtest86+ # BEGIN /etc/grub.d/30_os-prober #menuentry Windows 7 (loader) (on /dev/sda1) insmod ntfs set root=(hd0,1) search -no-floppy -fs-uuid -set de1ca47d1ca45277 chainloader +1# END /etc/grub.d/30_os-prober # 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 #menuentry Ubuntu, with Linux 2.6.32-24-generic -class ubuntu -class gnu-linux -class gnu -class os recordfail insmod ext2 set root=(hd0,9) search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f linux /boot/vmlinuz-2.6.32-24-generic root=UUID=fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f ro quiet splash initrd /boot/initrd.img-2.6.32-24-genericmenuentry Ubuntu, with Linux 2.6.32-24-generic (recovery mode) -class ubuntu -class gnu-linux -class gnu -class os recordfail insmod ext2 set root=(hd0,9) search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f echo Loading Linux 2.6.32-24-generic . linux /boot/vmlinuz-2.6.32-24-generic root=UUID=fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f ro single echo Loading initial ramdisk . initrd /boot/initrd.img-2.6.32-24-generic# END /etc/grub.d/10_linux # BEGIN /etc/grub.d/20_memtest86+ #menuentry Memory test (memtest86+) insmod ext2 set root=(hd0,9) search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f linux16 /boot/memtest86+.binmenuentry Memory test (memtest86+, serial console 115200) insmod ext2 set root=(hd0,9) search -no-floppy -fs-uuid -set fd9c0f6c-5c20-4d95-b3f4-eebca82bea0f linux16 /boot/memtest86+.bin console=ttyS0,115200n8# END /etc/grub.d/20_memtest86+ # BEGIN /etc/grub.d/30_os-prober #menuentry Windows 7 (loader) (on /dev/sda1) insmod ntfs set root=(hd0,1) search -no-floppy -fs-uuid -set de1ca47d1ca45277 chainloader +1# END /etc/grub.d/30_os-prober # 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 #-如上所示，每一个menuentry表示一个启动项，如：menuentry Windows 7 (loader) (on /dev/sda1) insmod ntfs set root=(hd0,1) search -no-floppy -fs-uuid -set de1ca47d1ca45277 chainloader +1表示win7的启动项，处于最后一个（本人计算机共有9个启动项，一般的也可能是7个等等）。若想修改启动项，只需将红色标记的部分中的数字做个修改，如set default=8 表示默认启动项是列表中的第九个，即本人计算机中的win7系统，“0”表示启动项列表中的第一个。蓝色标记的部分set timeout=10表示留10秒的时间供用户选择。当然了，如果嫌启动项太多太麻烦，只需将menuentry及其后面大括号所包含的部分删除，则相应的启动项就不会在启动时出现。还可以采取另外一种办法：将包含win7启动项的部分# BEGIN /etc/grub.d/30_os-prober #menuentry