Red Hat ENTERPRISE LINUX AS 2.1 - Guida di Installazione Scaricare il pdf (Pagina 13)

Chapter 3.

Kernel Upgrades

Make sure to install the latest kernel where all proprietary drivers, if applicable, are certified and

supported. Note that proprietary drivers are often installed under /lib/modules/<kernel-

version>/kernel/drivers/addon. For example, the EMC PowerPath drivers can be found in

the following directory when running the 2.4.21-32.0.1.ELhugemem kernel:

$ ls -al /lib/modules/2.4.21-32.0.1.ELhugemem/kernel/drivers/addon/emcpower

total 732

drwxr-xr-x 2 root root 4096 Aug 20 13:50 .

drwxr-xr-x 19 root root 4096 Aug 20 13:50 ..

-rw-r--r-- 1 root root 14179 Aug 20 13:50 emcphr.o

-rw-r--r-- 1 root root 2033 Aug 20 13:50 emcpioc.o

-rw-r--r-- 1 root root 91909 Aug 20 13:50 emcpmpaa.o

-rw-r--r-- 1 root root 131283 Aug 20 13:50 emcpmpap.o

-rw-r--r-- 1 root root 113922 Aug 20 13:50 emcpmpc.o

-rw-r--r-- 1 root root 75380 Aug 20 13:50 emcpmp.o

-rw-r--r-- 1 root root 263243 Aug 20 13:50 emcp.o

-rw-r--r-- 1 root root 8294 Aug 20 13:50 emcpsf.o

Therefore, when you upgrade the kernel you must ensure that all proprietary modules can be found

in the right directory so that the kernel can load them. To check which kernels are installed, run the

following command:

$ rpm -qa | grep kernel

To check which kernel is currently running, execute the following command:

$ uname -r

For example, to install the 2.4.21-32.0.1.ELhugemem kernel, download the kernel-hugemem RPM and

execute the following command:

# rpm -ivh kernel-hugemem-2.4.21-32.0.1.EL.i686.rpm

Note

Never upgrade the kernel using the RPM option '-U'. The previous kernel should always

be available if the newer kernel does not boot or work properly.

To make sure the right kernel is booted, check the /etc/grub.conf file if you use GRUB and

change the "default" attribute if necessary. Here is an example:

default=0

timeout=10

splashimage=(hd0,0)/grub/splash.xpm.gz

title Red Hat Enterprise Linux AS (2.4.21-32.0.1.ELhugemem)

root (hd0,0)

kernel /vmlinuz-2.4.21-32.0.1.ELhugemem ro root=/dev/sda2

initrd /initrd-2.4.21-32.0.1.ELhugemem.img

title Red Hat Enterprise Linux AS (2.4.21-32.0.1.ELsmp)

root (hd0,0)

kernel /vmlinuz-2.4.21-32.0.1.ELsmp ro root=/dev/sda2

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Red Hat ENTERPRISE LINUX AS 2.1 - Guida di Installazione Pagina 13