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1、CentOS 7 修改开机顺序在笔记本电脑安装了win8与centOS 7。按照以往的惯例，安装完centOS时，会在bootgrubgrub.conf里自动加入安装系统前其它系统的引导控制，但是实际上是没有的。此文不探讨如何将先系统引导加入centOS 7的/boot/grub2/grub.cfg当中。先查看我电脑上grub.cfg当中的内容如下（注意加粗内容）：rootlocalhost grub2# cat grub.cfg # DO NOT EDIT THIS FILE# It is automatically generated by grub2-mkconfig using tem
2、plates# from /etc/grub.d and settings from /etc/default/grub# BEGIN /etc/grub.d/00_header #set pager=1if -s $prefix/grubenv ; then load_envfiif $next_entry ; then set default=$next_entry set next_entry= save_env next_entry set boot_once=trueelse set default=$saved_entryfiif x$feature_menuentry_id =
3、xy ; then menuentry_id_option=-idelse menuentry_id_option=fiexport menuentry_id_optionif $prev_saved_entry ; then set saved_entry=$prev_saved_entry save_env saved_entry set prev_saved_entry= save_env prev_saved_entry set boot_once=truefifunction savedefault if -z $boot_once ; then saved_entry=$chose
4、n save_env saved_entry fifunction load_video if x$feature_all_video_module = xy ; then insmod all_video else insmod efi_gop insmod efi_uga insmod ieee1275_fb insmod vbe insmod vga insmod video_bochs insmod video_cirrus fiterminal_output consoleif x$feature_timeout_style = xy ; then set timeout_style
5、=menu set timeout=5# Fallback normal timeout code in case the timeout_style feature is# unavailable.else set timeout=5fi# END /etc/grub.d/00_header # Begin with windows 8#menuentry CentOS Linux (3.10.0-123.13.2.el7.x86_64) 7 (Core) -class centos -class gnu-linux -class gnu -class os -unrestricted $m
6、enuentry_id_option gnulinux-3.10.0-123.el7.x86_64-advanced-337b5933-c8eb-4c4e-8e7d-3a1f7aaa1e73 load_video set gfxpayload=keep insmod gzio insmod part_msdos insmod xfs set root=hd0,msdos2 if x$feature_platform_search_hint = xy ; then search -no-floppy -fs-uuid -set=root -hint-bios=hd0,msdos2 -hint-e
7、fi=hd0,msdos2 -hint-baremetal=ahci0,msdos2 -hint=hd0,msdos2 337b5933-c8eb-4c4e-8e7d-3a1f7aaa1e73 else search -no-floppy -fs-uuid -set=root 337b5933-c8eb-4c4e-8e7d-3a1f7aaa1e73 fi linux16 /boot/vmlinuz-3.10.0-123.13.2.el7.x86_64 root=UUID=337b5933-c8eb-4c4e-8e7d-3a1f7aaa1e73 ro vconsole.keymap=us vco
8、nsole.font=latarcyrheb-sun16 rhgb quiet LANG=zh_CN.UTF-8 initrd16 /boot/initramfs-3.10.0-123.13.2.el7.x86_64.imgmenuentry Windows 8(loader)(on /dev/sda1) -class windows -class or $menuentry_id_option osprober-chain-140E68540E6830C2 insmod part_msdos insmod ntfs set root=hd0,msdos1 chainloader +1# BE
9、GIN /etc/grub.d/10_linux #menuentry CentOS Linux, with Linux 3.10.0-123.el7.x86_64 -class centos -class gnu-linux -class gnu -class os -unrestricted $menuentry_id_option gnulinux-3.10.0-123.el7.x86_64-advanced-337b5933-c8eb-4c4e-8e7d-3a1f7aaa1e73 load_video set gfxpayload=keep insmod gzio insmod par
10、t_msdos insmod xfs set root=hd0,msdos2 if x$feature_platform_search_hint = xy ; then search -no-floppy -fs-uuid -set=root -hint-bios=hd0,msdos2 -hint-efi=hd0,msdos2 -hint-baremetal=ahci0,msdos2 -hint=hd0,msdos2 337b5933-c8eb-4c4e-8e7d-3a1f7aaa1e73 else search -no-floppy -fs-uuid -set=root 337b5933-c
11、8eb-4c4e-8e7d-3a1f7aaa1e73 fi linux16 /boot/vmlinuz-3.10.0-123.el7.x86_64 root=UUID=337b5933-c8eb-4c4e-8e7d-3a1f7aaa1e73 ro vconsole.keymap=us vconsole.font=latarcyrheb-sun16 rhgb quiet LANG=zh_CN.UTF-8 initrd16 /boot/initramfs-3.10.0-123.el7.x86_64.imgmenuentry CentOS Linux, with Linux 0-rescue-96f
12、17ff7113c494a98433dd3c1be3974 -class centos -class gnu-linux -class gnu -class os -unrestricted $menuentry_id_option gnulinux-0-rescue-96f17ff7113c494a98433dd3c1be3974-advanced-337b5933-c8eb-4c4e-8e7d-3a1f7aaa1e73 load_video insmod gzio insmod part_msdos insmod xfs set root=hd0,msdos2 if x$feature_p
13、latform_search_hint = xy ; then search -no-floppy -fs-uuid -set=root -hint-bios=hd0,msdos2 -hint-efi=hd0,msdos2 -hint-baremetal=ahci0,msdos2 -hint=hd0,msdos2 337b5933-c8eb-4c4e-8e7d-3a1f7aaa1e73 else search -no-floppy -fs-uuid -set=root 337b5933-c8eb-4c4e-8e7d-3a1f7aaa1e73 fi linux16 /boot/vmlinuz-0-rescue-96f17ff7113c494a98433dd3c1be3974 root=UUID=337b5933-c8eb-4c4e-8e7d-3a1f7aaa1e73 ro vconsole.keymap=us vconsole.font=latarcyrheb-sun16 rhgb quiet initrd16 /boot/initramfs-0-rescue-96f17ff7113c494a98433dd3c1be3974.imgif x$default = CentOS Linux, with Linux 3.10.
