ubuntu更改启动顺序

时间：2016-08-26 12:07:03 阅读：303 评论：0 收藏：0 [点我收藏+]

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在ubuntu中修改启动配置。

启动相关grub2主要包含下面三个文件：1. /boot/grub/grub.cfg 文件 2. /etc/grub.d/ 文件夹 3. /etc/default/grub 文件，可以通过修改这三个文件来修改启动项

链接：http://blog.csdn.net/zhu_liangwei/article/details/7847034

一

更改启动顺序，验证过的两种方式

1、修改 /etc/default/grub 文件

打开文件

sudo gedit /etc/default/grub

修改文件

GRUB_DEFAULT=0 #更改数字设置默认启动项

更新

sudo update-grub

 1 # If you change this file, run ‘update-grub‘ afterwards to update
 2 # /boot/grub/grub.cfg.
 3 # For full documentation of the options in this file, see:
 4 #   info -f grub -n ‘Simple configuration‘
 5 
 6 GRUB_DEFAULT=7     #更改数字设置默认启动项
 7 #GRUB_HIDDEN_TIMEOUT=0
 8 GRUB_HIDDEN_TIMEOUT_QUIET=true
 9 GRUB_TIMEOUT=10
10 GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
11 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
12 GRUB_CMDLINE_LINUX=""
13 
14 # Uncomment to enable BadRAM filtering, modify to suit your needs
15 # This works with Linux (no patch required) and with any kernel that obtains
16 # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
17 #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"
18 
19 # Uncomment to disable graphical terminal (grub-pc only)
20 #GRUB_TERMINAL=console
21 
22 # The resolution used on graphical terminal
23 # note that you can use only modes which your graphic card supports via VBE
24 # you can see them in real GRUB with the command `vbeinfo‘
25 #GRUB_GFXMODE=640x480
26 
27 # Uncomment if you don‘t want GRUB to pass "root=UUID=xxx" parameter to Linux
28 #GRUB_DISABLE_LINUX_UUID=true
29 
30 # Uncomment to disable generation of recovery mode menu entries
31 #GRUB_DISABLE_RECOVERY="true"
32 
33 # Uncomment to get a beep at grub start
34 #GRUB_INIT_TUNE="480 440 1"

配置文件详解 http://lesca.me/archives/manage-grub2-config-file.html

技术分享

二

修改 /boot/grub/grub.cfg文件，使用sudo update-grub会被覆盖掉。

打开文件

sudo gedit /boot/grub/grub.cfg

修改文件

set default = ‘0‘ 修改数字

  1 #
  2 # DO NOT EDIT THIS FILE
  3 #
  4 # It is automatically generated by grub-mkconfig using templates
  5 # from /etc/grub.d and settings from /etc/default/grub
  6 #
  7 
  8 ### BEGIN /etc/grub.d/00_header ###
  9 if [ -s $prefix/grubenv ]; then
 10   set have_grubenv=true
 11   load_env
 12 fi
 13 set default="7"
 14 if [ "${prev_saved_entry}" ]; then
 15   set saved_entry="${prev_saved_entry}"
 16   save_env saved_entry
 17   set prev_saved_entry=
 18   save_env prev_saved_entry
 19   set boot_once=true
 20 fi
 21 
 22 function savedefault {
 23   if [ -z "${boot_once}" ]; then
 24     saved_entry="${chosen}"
 25     save_env saved_entry
 26   fi
 27 }
 28 
 29 function recordfail {
 30   set recordfail=1
 31   if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
 32 }
 33 
 34 function load_video {
 35   insmod vbe
 36   insmod vga
 37   insmod video_bochs
 38   insmod video_cirrus
 39 }
 40 
 41 insmod part_msdos
 42 insmod ext2
 43 set root=‘(hd0,msdos7)‘
 44 search --no-floppy --fs-uuid --set=root dea69c19-08d2-433a-89b9-f917b6d5cce4
 45 if loadfont /usr/share/grub/unicode.pf2 ; then
 46   set gfxmode=auto
 47   load_video
 48   insmod gfxterm
 49   insmod part_msdos
 50   insmod ext2
 51   set root=‘(hd0,msdos7)‘
 52   search --no-floppy --fs-uuid --set=root dea69c19-08d2-433a-89b9-f917b6d5cce4
 53   set locale_dir=($root)/boot/grub/locale
 54   set lang=zh_CN
 55   insmod gettext
 56 fi
 57 terminal_output gfxterm
 58 if [ "${recordfail}" = 1 ] ; then
 59   set timeout=30
 60 else
 61   set timeout=10
 62 fi
 63 ### END /etc/grub.d/00_header ###
 64 
 65 ### BEGIN /etc/grub.d/05_debian_theme ###
 66 set menu_color_normal=white/black
 67 set menu_color_highlight=black/light-gray
 68 if background_color 44,0,30; then
 69   clear
 70 fi
 71 ### END /etc/grub.d/05_debian_theme ###
 72 
 73 ### BEGIN /etc/grub.d/10_linux ###
 74 function gfxmode {
 75     set gfxpayload="${1}"
 76     if [ "${1}" = "keep" ]; then
 77         set vt_handoff=vt.handoff=7
 78     else
 79         set vt_handoff=
 80     fi
 81 }
 82 if [ "${recordfail}" != 1 ]; then
 83   if [ -e ${prefix}/gfxblacklist.txt ]; then
 84     if hwmatch ${prefix}/gfxblacklist.txt 3; then
 85       if [ ${match} = 0 ]; then
 86         set linux_gfx_mode=keep
 87       else
 88         set linux_gfx_mode=text
 89       fi
 90     else
 91       set linux_gfx_mode=text
 92     fi
 93   else
 94     set linux_gfx_mode=keep
 95   fi
 96 else
 97   set linux_gfx_mode=text
 98 fi
 99 export linux_gfx_mode
100 if [ "${linux_gfx_mode}" != "text" ]; then load_video; fi
#********************这是一个启动项，启动项0
101 menuentry ‘Ubuntu，Linux 3.2.0-101-generic‘ --class ubuntu --class gnu-linux --class gnu --class os {
102     recordfail
103     gfxmode $linux_gfx_mode
104     insmod gzio
105     insmod part_msdos
106     insmod ext2
107     set root=‘(hd0,msdos7)‘
108     search --no-floppy --fs-uuid --set=root dea69c19-08d2-433a-89b9-f917b6d5cce4
109     linux    /boot/vmlinuz-3.2.0-101-generic root=UUID=dea69c19-08d2-433a-89b9-f917b6d5cce4 ro   quiet splash $vt_handoff
110     initrd    /boot/initrd.img-3.2.0-101-generic
111 }
112 menuentry ‘Ubuntu, with Linux 3.2.0-101-generic (recovery mode)‘ --class ubuntu --class gnu-linux --class gnu --class os {
113     recordfail
114     insmod gzio
115     insmod part_msdos
116     insmod ext2
117     set root=‘(hd0,msdos7)‘
118     search --no-floppy --fs-uuid --set=root dea69c19-08d2-433a-89b9-f917b6d5cce4
119     echo    ‘载入 Linux 3.2.0-101-generic ...‘
120     linux    /boot/vmlinuz-3.2.0-101-generic root=UUID=dea69c19-08d2-433a-89b9-f917b6d5cce4 ro recovery nomodeset 
121     echo    ‘载入初始化内存盘...‘
122     initrd    /boot/initrd.img-3.2.0-101-generic
123 }
124 menuentry ‘Ubuntu，Linux 3.19.0-68-generic‘ --class ubuntu --class gnu-linux --class gnu --class os {
125     recordfail
126     gfxmode $linux_gfx_mode
127     insmod gzio
128     insmod part_msdos
129     insmod ext2
130     set root=‘(hd0,msdos7)‘
131     search --no-floppy --fs-uuid --set=root dea69c19-08d2-433a-89b9-f917b6d5cce4
132     linux    /boot/vmlinuz-3.19.0-68-generic root=UUID=dea69c19-08d2-433a-89b9-f917b6d5cce4 ro   quiet splash $vt_handoff
133     initrd    /boot/initrd.img-3.19.0-68-generic
134 }
135 menuentry ‘Ubuntu, with Linux 3.19.0-68-generic (recovery mode)‘ --class ubuntu --class gnu-linux --class gnu --class os {
136     recordfail
137     insmod gzio
138     insmod part_msdos
139     insmod ext2
140     set root=‘(hd0,msdos7)‘
141     search --no-floppy --fs-uuid --set=root dea69c19-08d2-433a-89b9-f917b6d5cce4
142     echo    ‘载入 Linux 3.19.0-68-generic ...‘
143     linux    /boot/vmlinuz-3.19.0-68-generic root=UUID=dea69c19-08d2-433a-89b9-f917b6d5cce4 ro recovery nomodeset 
144     echo    ‘载入初始化内存盘...‘
145     initrd    /boot/initrd.img-3.19.0-68-generic
146 }
147 submenu "Previous Linux versions" {
148 menuentry ‘Ubuntu，Linux 3.2.0-105-generic‘ --class ubuntu --class gnu-linux --class gnu --class os {
149     recordfail
150     gfxmode $linux_gfx_mode
151     insmod gzio
152     insmod part_msdos
153     insmod ext2
154     set root=‘(hd0,msdos7)‘
155     search --no-floppy --fs-uuid --set=root dea69c19-08d2-433a-89b9-f917b6d5cce4
156     linux    /boot/vmlinuz-3.2.0-105-generic root=UUID=dea69c19-08d2-433a-89b9-f917b6d5cce4 ro   quiet splash $vt_handoff
157     initrd    /boot/initrd.img-3.2.0-105-generic
158 }
159 menuentry ‘Ubuntu, with Linux 3.2.0-105-generic (recovery mode)‘ --class ubuntu --class gnu-linux --class gnu --class os {
160     recordfail
161     insmod gzio
162     insmod part_msdos
163     insmod ext2
164     set root=‘(hd0,msdos7)‘
165     search --no-floppy --fs-uuid --set=root dea69c19-08d2-433a-89b9-f917b6d5cce4
166     echo    ‘载入 Linux 3.2.0-105-generic ...‘
167     linux    /boot/vmlinuz-3.2.0-105-generic root=UUID=dea69c19-08d2-433a-89b9-f917b6d5cce4 ro recovery nomodeset 
168     echo    ‘载入初始化内存盘...‘
169     initrd    /boot/initrd.img-3.2.0-105-generic
170 }
171 menuentry ‘Ubuntu，Linux 3.2.0-102-generic‘ --class ubuntu --class gnu-linux --class gnu --class os {
172     recordfail
173     gfxmode $linux_gfx_mode
174     insmod gzio
175     insmod part_msdos
176     insmod ext2
177     set root=‘(hd0,msdos7)‘
178     search --no-floppy --fs-uuid --set=root dea69c19-08d2-433a-89b9-f917b6d5cce4
179     linux    /boot/vmlinuz-3.2.0-102-generic root=UUID=dea69c19-08d2-433a-89b9-f917b6d5cce4 ro   quiet splash $vt_handoff
180     initrd    /boot/initrd.img-3.2.0-102-generic
181 }
182 menuentry ‘Ubuntu, with Linux 3.2.0-102-generic (recovery mode)‘ --class ubuntu --class gnu-linux --class gnu --class os {
183     recordfail
184     insmod gzio
185     insmod part_msdos
186     insmod ext2
187     set root=‘(hd0,msdos7)‘
188     search --no-floppy --fs-uuid --set=root dea69c19-08d2-433a-89b9-f917b6d5cce4
189     echo    ‘载入 Linux 3.2.0-102-generic ...‘
190     linux    /boot/vmlinuz-3.2.0-102-generic root=UUID=dea69c19-08d2-433a-89b9-f917b6d5cce4 ro recovery nomodeset 
191     echo    ‘载入初始化内存盘...‘
192     initrd    /boot/initrd.img-3.2.0-102-generic
193 }
194 }
195 ### END /etc/grub.d/10_linux ###
196 
197 ### BEGIN /etc/grub.d/20_linux_xen ###
198 ### END /etc/grub.d/20_linux_xen ###
199 
200 ### BEGIN /etc/grub.d/20_memtest86+ ###
201 menuentry "Memory test (memtest86+)" {
202     insmod part_msdos
203     insmod ext2
204     set root=‘(hd0,msdos7)‘
205     search --no-floppy --fs-uuid --set=root dea69c19-08d2-433a-89b9-f917b6d5cce4
206     linux16    /boot/memtest86+.bin
207 }
208 menuentry "Memory test (memtest86+, serial console 115200)" {
209     insmod part_msdos
210     insmod ext2
211     set root=‘(hd0,msdos7)‘
212     search --no-floppy --fs-uuid --set=root dea69c19-08d2-433a-89b9-f917b6d5cce4
213     linux16    /boot/memtest86+.bin console=ttyS0,115200n8
214 }
215 ### END /etc/grub.d/20_memtest86+ ###
216 
217 ### BEGIN /etc/grub.d/30_os-prober ###
218 menuentry "Windows 7 (loader) (on /dev/sda2)" --class windows --class os {
219     insmod part_msdos
220     insmod ntfs
221     set root=‘(hd0,msdos2)‘
222     search --no-floppy --fs-uuid --set=root 40B2F9AEB2F9A894
223     chainloader +1
224 }
225 menuentry "Windows 7 (loader) (on /dev/sda3)" --class windows --class os {
226     insmod part_msdos
227     insmod ntfs
228     set root=‘(hd0,msdos3)‘
229     search --no-floppy --fs-uuid --set=root 0007D948000E6321
230     chainloader +1
231 }
232 set timeout_style=menu
233 if [ "${timeout}" = 0 ]; then
234   set timeout=10
235 fi
236 ### END /etc/grub.d/30_os-prober ###
237 
238 ### BEGIN /etc/grub.d/30_uefi-firmware ###
239 ### END /etc/grub.d/30_uefi-firmware ###
240 
241 ### BEGIN /etc/grub.d/40_custom ###
242 # This file provides an easy way to add custom menu entries.  Simply type the
243 # menu entries you want to add after this comment.  Be careful not to change
244 # the ‘exec tail‘ line above.
245 ### END /etc/grub.d/40_custom ###
246 
247 ### BEGIN /etc/grub.d/41_custom ###
248 if [ -f  $prefix/custom.cfg ]; then
249   source $prefix/custom.cfg;
250 fi
251 ### END /etc/grub.d/41_custom ###

ubuntu更改启动顺序

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原文地址：http://www.cnblogs.com/hb91/p/5809710.html

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