On Wed, Mar 9, 2011 at 12:40 AM, Todd Cary todd@aristesoftware.com wrote:
My current kernel is "vmlinuz-2.6.9-89.35.1" per grub.conf:
#boot=/dev/hdc default=1 timeout=5 splashimage=(hd0,0)/grub/splash.xpm.gz hiddenmenu title CentOS (2.6.9-100.EL) root (hd0,0) kernel /vmlinuz-2.6.9-100.EL ro root=/dev/VolGroup00/LogVol00 rhgb quiet initrd /initrd-2.6.9-100.EL.img title CentOS (2.6.9-89.35.1.ELsmp) root (hd0,0) kernel /vmlinuz-2.6.9-89.35.1.ELsmp ro root=/dev/VolGroup00/LogVol00 rhgb quiet initrd /initrd-2.6.9-89.35.1.ELsmp.img
What is the correct syntax for "rpm -U -replacepkgs [kernel-whatever].rpm" ? What should go into [kernel-whaetver]?
In like manner, I have forgotten how to do a query on it to see if it is present as in
# rpm -q [kernel-name]
Sorry, but it has been a long time since I used rpm and my Admin book does not give an example.
Todd
OK, this should all go to the list for other CentOS folks who run into this kind of adventure. To get the full list of RPM's, look at the syntax of the "/etc/cron.daily/rpm"nightly script.
man rpm
to look up the available options and learn about them. It's usually worth learning about such an important command, and RPM components are what yum really uses, so it's helpful to understand.
rpm -qa | grep kernel
to get the list of kernel related components. Because of this line in your grub.conf:
kernel /vmlinuz-2.6.9-100.EL
I can also deduce that the relevant vmlinuz file was at /boot/bmlinuz-2.6.9-100.EL, and you can use the command "rpm -q -f /boot/vmlinuz-2.6.9-100.EL" to figure out what package it belonged to.
rpm -q -f /boot/vmlinuz-2.6.9-100.EL --qf '%{name}-%{version}-%{release}.%{arch}.rpm\n'
will get you the get the full package name of the actual kernel RPM.
Download the latest RPM from your favorite CentOS repository, after all, updating your kernel is you got into this trouble in the first place.
rpm -U --replacepkgs [whatever the name of that actual downloaded rpm is]
See, you shouldn't *care* about your actual running kernel. You wanted the update, right? Go for it!!!! The running kernel will present problems you want the most recent one.