阐述备份Linux内核步骤（如何备份内核）-运维-知优网

随着学习Suse的深入，面临的问题也是越来越多，Suse编译内核是非常头疼的，今天编译Suse 10.2内核直接导致Suse面临重装，要是备份Linux内核就好了，本文就是介绍备份Linux内核的简单步骤。

随着学习Suse的深入，面临的问题也是越来越多，Suse编译内核是非常头疼的，今天编译Suse 10.2内核直接导致Suse面临重装，要是备份Linux内核就好了，备份Linux内核相当的简单，下面就是步骤，英文也很简单，相信准备对内核有所动作的人都能轻易看懂。虽然是针对Suse写的，其它Linux发行版本也大同小异，下面就是备份Linux内核的简单步骤：

1)openterminal 
2)sutoroot 
3)changedirectoryto/boot 
#cd/boot 
4)seewhatarethenamesofrunningkernels 
#ls 
5)makebackupcopyofyourkernelandSystem.map 
#cpvmlinuz-2.6.18.8-0.1-defaultvmlinuz-2.6.18.8-0.1-bak 
#cpSystem.map-2.6.18.8-0.1-defaultSystem.map-2.6.18.8-0.1-bak 
#cp-R/lib/modules/2.6.18.8-0.1-default/lib/modules/2.6.18.8-0.1-bak 
6)createinitrd 
#mkinitrd-s1024×768 
7)checkifnewinitrdwascreated: 
#ls 
andlookforinitrd-2.6.18.8-0.1-bak 
8)makebackupofyourcurrentGRUBmenu(inthecasethatyoumayscrewupediting) 
#cp/boot/grub/menu.lst/boot/grub/menu.lst_bak 
9)editgrubmenuwhatevereditor(Iusevi,butyoumayusekedit.gedit,joe,picoandsoonaslongasyouruneditorwithrootprivileges) 
boot/grub/menu.lst 
10)addnewentryattheendofthefile(copyoriginalentryforSuseLinux10.2): 
titleSuseLinux10.2kernelbackup 
root(hd0,0) 
kernel/vmlinuz-2.6.18.8-0.1-bakroot=/dev/sda2vga=0×317vga=normalvideo=vesa:1024×768@60resume=/dev/sda3elevator=deadlinesplash=silentshowopts 
initrd/initrd-2.6.18.8-0.1-bak 
importantchangesaremarkedbold.Youmaynothavetheotherstufforitmaybedifferent.SimplykeeptherestofthefileexactlythesameasintheoriginalentryforSuseLinux10.2 
11)savethefile 
12)restartcomputerandselectfromGRUBmenu“SuseLinux10.2kernelbackup” 
ifsystembootssuccessfullyyouhaveworkingkernelbackup,nowifSuseupdateskernelnexttimeandnewkernelwillnotbootproperly,youcanalwaysboottoSuseLinux10.2kernelbackupwhichwillneverbemodified(andsafefromscrewedupdates) 
举一反三的令一种方法： 
ideallywouldbedosomethingdifferent: 
1)installkernelsources 
2)sutoroot 
3)copykernelsourcestothenewdirecory: 
#cp-R/usr/src/Linux-2.6.18.8-0.1/usr/src/Linux-2.6.18.8-0.1-bak 
4)changedirectoryto/usr/src/Linux-2.6.18.8-0.1-bak 
#cd/usr/src/Linux-2.6.18.8-0.1-bak 
5)createconfigfile 
#makeoldconfig 
6)changekernelname(superimportant!!!) 
byediting.configfile(in/usr/src/Linux-2.6.18.8-0.1-bak)Tehreisadotbefore“config” 
scrolldowntotheline: 
# 
#Generalsetup 
# 
CONFIG_LOCALVERSION=”" 
andchangelocalkernelnameversionbyadding: 
CONFIG_LOCALVERSION=”-bak” 
ifthereisanythingalreadywrittenintheline 
CONFIG_LOCALVERSION=”" 
deleteoldnamerememberthatnewnamemusthavequotationmarks. 
7)savefile 
8)compilekernel 
#makebzImage&&makemodules&&makemodules_install&&makeinstall 
Youjustcreatedanewkernel!Exactlythesameastherunningonebutthenamewillhave“-bak”attheend 
thereisnothingmorerequired.inyourGRUBmenuwillappearanewentrypointingtothenewkernel.Oldkernelwillnotbeaffected(ifyoudidexactlyasIsuggested) 
newkernelisinvisibletoYastandwillneverbechanged. 
BecausethelatestkernelupgradeisarealdisasterIwouldmakebackupcopyofgrubmenu(asroot): 
#cp/boot/grub/menu.lst/boot/grub/menu.lst_bak 
nowyoucanboottothenewkernel 
youwillgettocommandline(whenbootingtothenewkernel)ifyouinstallednvidia/atidrivers, 
Thatiseasytofixofcourse.whatisimportant,youhaveworkingSusesetupinspiteofallSusedevseffortstoscrewyouup