Clean up extra startup items for Ubuntu

Original source: Http://hi.baidu.com/iceliushuai/item/f43a0c2ecf04e50e72863e19

Ubuntu has been used for a long time, installing a lot of kernels, and when you start the system, there will be a lot of entries, most of which are not necessary if your system is working properly.

For example, I have never used the two entries of recovery mode and memtest86+.

1. Clean up the excess kernel

Aptitude Search Linux-image # Find image

shily@hh-desktop:~$ Aptitude Search Linux-image # Find image P Linux-image                                  
-Generic Linux kernel image.                                                                     
V linux-image-2.6- I linux-image-2.6.38-10-generic-linux kernel image fo                                      R version 2.6.38 on x86/x86_64 p linux-image-2.6.38-10-generic-pae -Linux kernel image for version 2.6.38 on x86 p linux-image-2.6.38-10-                             
Virtual-linux kernel image for version 2.6.38 on x86/x86_64 I A linux-image-2.6.38-11-generic-linux kernel image for version 2.6. X86/x86_64 P Linux-image-2.6.38-11-generic-pae-linux kernel image for version 2.6.38 on x86 P Linux-image-2.6.38-11-virtual-linux kernel image for version 2.                                           6.38 on x86/x86_64 P linux-image-2.6.38-8-generic                                       -Linux kernel image for version 2.6.38 on x86/x86_64 p linux-image-2.6.38-8-generic-pae   -Linux kernel image for version 2.6.38 on x86 p Linux-image-2.6.38-8-virtual-linux kernel image for version 2.6.38 on x86/x8 6_64 P Linux-image-2.6.38-9-generic-linux Kerne                                       L image for version 2.6.38 on x86/x86_64 p linux-image-2.6.38-9-generic-pae - Linux kernel image for version 2.6.38 on x86 p linux-image-2.6.38-9-virtual   -Linux kernel image for version 2.6.38 on x86/x86_64 i                                                      
Linux-image-generic-generic Linux kernel image  P Linux-image-generic-pae-generic Linux                                                     Kernel image P Linux-image-server                                         
-Linux kernel image on Server equipment.    P Linux-image-virtual-linux kernel image for virtual machines

Aptitude Search Linux-image | grep ^i # Find installed image

shily@hh-desktop:~$ Aptitude Search Linux-image | grep ^i  # Find installed image
I   linux-image-2.6.38-10-generic                                          -Linux kernel image for version 2.6.38 on x86/ x86_64      
i A linux-image-2.6.38-11-generic   -Linux kernel image for version 2.6.38 on x
i   Linux-image-generic             

UNAME-R # Determine which image is currently in use

shily@hh-desktop:~$ uname-r  # Determine which image is currently in use
2.6.38-11-generic

sudo aptitude remove linux-image-2.6.38-10-generic linux-image-2.6.38-11-generic # Remove excess image, multiple spaces can be separated

shily@hh-desktop:~$ sudo aptitude remove linux-image-2.6.38-10-generic  # Delete superfluous image

In addition, you can also use Ubuntu Tweek to clean the kernel, and install the way you want.

2. Prohibit recovery mode option

This is really no use, if necessary, you can modify the normal startup items, add a single parameter, usually do not need to see it every time.

Read /etc/grub.d/10_linux will find that a variable is checked before adding the RECOVERY option:grub_disable_recovery

So set this variable and use root to edit /etc/default/grub

Remove the # number before the grub_disable_recovery= "true":

--/etc/default/grub.old    2013-03-26 10:38:13.000000000 +0800
+++/etc/default/grub    2013-03-22 14:37:33.000000000
+0800 @@ -28,7 +28,7 @@ -28,7
 =true
    
 # uncomment to DISABLE generation of Recovery Mode menu Entries
-#GRUB_DISABLE_RECOVERY = "true"
+grub_disable_recovery= "true"
    
 # Uncomment To get a beep at grub start
 #GRUB_INIT_TUNE = "480 440 1"

Update configuration file after modification

shily@hh-desktop:~$ sudo update-grub

Looking again at /boot/grub/grub.cfg will find that there are no recovery related entries.

3. Disable the memtest86+ option to remove the executable properties of the/etc/grub.d/20_memtest86+ file

sudo chmod-x/etc/grub.d/20_memtest86+
sudo update-grub

Warning:

1, the operation is in danger, please back up the original file first.

2, be sure to confirm that the/boot/grub/grub.cfg file format is normal before restarting.