Hi, After upgrading my workstation to CentOS 7.5 (1804), I had to upgrade my kernel from vanilla to kernel-lt from ELRepo. My NVidia GeForce 210 would only work with the driver provided by NVidia, which in turn required a more recent kernel than 3.0.10. Anyway. Right now here's all the kernels that I have on my workstation: [root at alphamule:~] # rpm -qa | grep -i kernel kernel-lt-devel-4.4.129-1.el7.elrepo.x86_64 kernel-lt-devel-4.4.131-1.el7.elrepo.x86_64 kernel-lt-headers-4.4.131-1.el7.elrepo.x86_64 kernel-lt-4.4.131-1.el7.elrepo.x86_64 kernel-lt-4.4.129-1.el7.elrepo.x86_64 And here's what I'm currently running: [root at alphamule:~] # uname -r 4.4.129-1.el7.elrepo.x86_64 I have a Logitech Illuminated USB keyboard, and one of the quirks of this piece of hardware is that it's unresponsive on boot time. Meaning when GRUB displays the kernel menu, the arrow keys (or for the matter any keys) won't work. Which means the only choice I have left is either boot the default kernel in the list... or go to another office, grab a standard USB keyboard and plug it in temporarily just to choose the kernel to boot. So right now I have two kernels on my machine, the 4.4.129 and the 4.4.131. How do I configure GRUB so that on the next reboot, it defaults to the 4.4.131 kernel? I knew how to do this with LILO under Slackware, but GRUB is a very different beast. Cheers, Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Site : https://www.microlinux.fr Blog : https://blog.microlinux.fr Mail : info at microlinux.fr Tél. : 04 66 63 10 32