I am trying to upgrade my kernel on a machine with multiple OS'es. I have a Red Hawk OS (a real-time Red Hat variant) and Red Hat installed. I can select which OS to boot into using grub.
I'd like to upgrade the Red Hat OS which is currently running kernel 2.6 to kernel 3.11.
I booted into the Red Hat OS using Grub and then I followed the instructions here (which I have used successfully before to upgrade a CentOS): http://www.linuxfunda.com/2013/11/08/how-to-upgrade-the-kernel-on-centos/
However the commands seem to upgrade my Red Hawk OS instance instead of the Red Hat OS instance.
When I look at the grub entries I see the following:
title RedHawk Linux (3.10.37) root (hd0,0) kernel /vmlinuz-3.10.37 ro root=/dev/mapper/vg_dornier-lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_NO_MD rd_LVM_LV=vg_dornier/lv_swap SYSFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg_dornier/lv_root KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb nmi_watchdog=0 enforcing=0 quiet isolcpus=6,7 initrd /initramfs-3.10.37.img
How can I appropriately select which OS to upgrade?