literally all you have to do is rpm -ihv <kernel>.rpm This will put both kernels in yoiur grub.conf file so when you boot up, you can choose to boot up with your current kernel or you smp kernel. Wayner >>> steve.stamper@xxxxxxxxxxxx 02/23/07 6:20 am >>> I inherited several RHEL3 systems that only have the single processor kernel installed (vmlinux-2.4.21-4.EL). We are changing the hardware configuration. I'm not sure how to install the mp kernel without completely rebuilding. Any suggestions??? Thanks² - Steve -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list