Greetings, ----- Original Message ----- > # yum reinstall kernel > Loaded plugins: langpacks > Skipping the running kernel: kernel-3.10.0-123.el7.x86_64 > Error: Nothing to do The issue is the kernel you are running/have installed is newer than the one provided by the "yum distro-sync full" operation and updating to older kernels isn't something it was designed to do. You can get past that by manually installing the older kernel by referring to it by the complete name including version number... and then rebooting making sure to boot the older kernel. When the undesired kernel is no longer the one that is running, you can remove it... and a "yum distro-sync full" should be happy. TYL, -- Scott Dowdle 704 Church Street Belgrade, MT 59714 (406)388-0827 [home] (406)994-3931 [work]