Update the Ubuntu server 10.4 kernel and edit the kernel startup Item

Environment: Ubuntu server 10.04

 

UB 10.04 uses grub2

The configuration file is in

Root @ serveru3:/etc/default # Vim/etc/default/GRUB

 

Refer:

Http://ubuntuforums.org/showthread.php? T = 1302743 & Highlight = grub2 + common

Http://ubuntuforums.org/showthread.php? T = 1195275

 

 

If there is only one operating system, you must press and hold the shfit key,

 

For more information, see the previous two articles.

 

Unhide/hide the menu hide/show menu
File:/Etc/default/GRUB
Line to edit (5 ):

Quote:

Grub_hidden_timeout = 0

Example to unhide the menu:# Grub_hidden_timeout = 0AndDefault_timeout = x

Comment out #Grub_hidden_timeout = 0

Set the wait time to X ult_timeout = x

By default, if no other operating system is found on the system, grub 2 willNotDisplay the menu. The system will boot directly into the default entry.

Grub 2 does not display menus by default when there are no other operating systems. The system directly enters the default entry.

To display the menu:

• Place a comment symbol (#) at the start of the "grub_hidden_timeout = x" line.
• X = the number of seconds to stay
• Make sure the "default_timeout = x" entry is a positive integer. X is the number of seconds the menu will be displayed. Quote:

  #Grub_hidden_timeout = 0 Grub_hidden_timeout_quiet = true Grub_timeout ="10"

  Ode:

gksu gedit /etc/default/grub

Save the file, then update the menu:

Code:

sudo update-grub

In this case, the system searches

Searching for grub installation Director y... found:/boot/GRUB
Searching for default file... generatin g/boot/GRUB/default file and setting th e default boot entry to 0
Searching for grub installation Director y... found:/boot/GRUB
Testing for an existing GRUB menu. lst fi le...

Cocould not find/boot/GRUB/menu. LST file. wocould you like/boot/GRUB/menu. lst gene rated for you? (Y/n) y

No/boot/GRUB/menu. lst is found. Create a new one,
Searching for splash image... None found, skipping...
Found grub 2:/boot/GRUB/CORE. img
Found kernel:/memtest86 +. Bin
Found kernel:/vmlinuz-2.6.32-22-server
Found kernel:/vmlinuz-2.6.32-21-server
Found grub 2:/boot/GRUB/CORE. img
Found kernel:/memtest86 +. Bin
Updating/boot/GRUB/menu. lst... Done

Update complete.

Root @ serveru3:/etc/default #

/Boot/GRUB # Vim menu. lst

In this way, the kernel selection project is started.

To hide the menu on boot:
There shoshould be no # symbol at the start of the line:Grub_hidden_timeout = 0Line. "0" will boot the system without a timeout. A positive integer will leave a blank screen for that number of seconds, allowing the user time to press "ESC" or "shift" to display the menu. the splash screen will still display during the timeout.

 

 

CAT/etc/LSB-release

 

Input:

View the kernel version in sudo uname-R

Root @ serveru2 :~ # Uname-R
2.6.32-22-Server

 

/Lib/modules

/Lib/modules # ls
2.6.32-21-server 2.6.32-22-Server

 

 

Input: APT-cache search Linux image server

 

Apt-Get install linux-image-2.6.32-22-server

 

View

 

Root @ serveru2:/lib/modules # ls-la
Total 24
Drwxr-XR-x 4 Root 4096 2010-06-29 19: 44.
Drwxr-XR-x 13 Root 12288 2010-06-26 08:57 ..
Drwxr-XR-x 4 Root 4096 2010-06-25 20:47 2.6.32-21-Server
Drwxr-XR-x 4 Root 4096 2010-06-29 19: 45 2.6.32-22-Server

Check the current kernel, not changed,

Uname-R
2.6.32-21-Server

 

After reboot,

 

Root @ serveru2 :~ # Uname-R
2.6.32-22-Server
Root @ serveru2 :~ #