HOW TO UPGRADE A KERNEL:
TASK:-
1.UPDATE THE KERNEL
a. use uname –a -> to revel the current version.
b. use rpm –qa | grep –i kernel --> to revel installed version
c. cat /etc/grub.conf -> /boot/grub/gub.conf
2. PROPER INSTALLATION METHOD IS AS FOLLOWS:
a. rpm –ivh kernel*.rpm à install a separate version. It wont override or tamper the older version of kernel . Where as rpm –Uvh overrides the older kernel version.
Note :- Install the following kernel packages if necessary:
a. Kernel-devel* -> if module compilation is necessary
b. Kernel – headers* -> if recompilation is necessary.
Install:-
a. rpm –ivh kernel-2.6.18.53*.rpm
Note: this will update GRUB ( /boot/grub/grub.conf)
Note: will also place the new kernel in the /boot file system.
Examine traces in:
a. /boot
b. /boot/grub/grub.conf
3. Remove traces of former kernel :-
a. kernel-2.6.18-8.el5 – removes older version
b. rpm -e --nodepskernel-headers8.el5
c. rpm -e kernel-devel-*.el5
4. Install new kernel-headers and kernel-devel packages using YUM:
a. yum -y install kernel-headers
b. yum –y install kernel-devel
5. Confirm that the 3 kernel-* packages are installed:
a. rpm –qa | grep kernel
Note: Removal of older kernel -* packages cleans up :
a. /boot
b. /boot/grub/grub.conf
3. Remove traces of former kernel :-
a. kernel-2.6.18-8.el5 – removes older version
b. rpm -e --nodepskernel-headers8.el5
c. rpm -e kernel-devel-*.el5
4. Install new kernel-headers and kernel-devel packages using YUM:
a. yum -y install kernel-headers
b. yum –y install kernel-devel
5. Confirm that the 3 kernel-* packages are installed:
a. rpm –qa | grep kernel
Note: Removal of older kernel -* packages cleans up :
a. /boot
b. /boot/grub/grub.conf
TASK:-
1.UPDATE THE KERNEL
a. use uname –a -> to revel the current version.
b. use rpm –qa | grep –i kernel --> to revel installed version
c. cat /etc/grub.conf -> /boot/grub/gub.conf
2. PROPER INSTALLATION METHOD IS AS FOLLOWS:
a. rpm –ivh kernel*.rpm à install a separate version. It wont override or tamper the older version of kernel . Where as rpm –Uvh overrides the older kernel version.
Note :- Install the following kernel packages if necessary:
a. Kernel-devel* -> if module compilation is necessary
b. Kernel – headers* -> if recompilation is necessary.
Install:-
a. rpm –ivh kernel-2.6.18.53*.rpm
Note: this will update GRUB ( /boot/grub/grub.conf)
Note: will also place the new kernel in the /boot file system.
Examine traces in:
a. /boot
b. /boot/grub/grub.conf
3. Remove traces of former kernel :-
a. kernel-2.6.18-8.el5 – removes older version
b. rpm -e --nodepskernel-headers8.el5
c. rpm -e kernel-devel-*.el5
4. Install new kernel-headers and kernel-devel packages using YUM:
a. yum -y install kernel-headers
b. yum –y install kernel-devel
5. Confirm that the 3 kernel-* packages are installed:
a. rpm –qa | grep kernel
Note: Removal of older kernel -* packages cleans up :
a. /boot
b. /boot/grub/grub.conf
3. Remove traces of former kernel :-
a. kernel-2.6.18-8.el5 – removes older version
b. rpm -e --nodepskernel-headers8.el5
c. rpm -e kernel-devel-*.el5
4. Install new kernel-headers and kernel-devel packages using YUM:
a. yum -y install kernel-headers
b. yum –y install kernel-devel
5. Confirm that the 3 kernel-* packages are installed:
a. rpm –qa | grep kernel
Note: Removal of older kernel -* packages cleans up :
a. /boot
b. /boot/grub/grub.conf