Fixing grub using dracut Last kernel update was not successful to me. Centos can not boot with next messages: [ 180.098802] dracut-initqueue[376]: Warning: dracut-initqueue timeout - starting timeout scripts [ 180.610167] dracut-initqueue[376]: Warning: dracut-initqueue timeout - starting timeout scripts [ 181.121619] dracut-initqueue[376]: Warning: dracut-initqueue timeout - starting timeout scripts [ 181.633093] dracut-initqueue[376]: Warning: dracut-initqueue timeout - starting timeout scripts [ 182.144831] dracut-initqueue[376]: Warning: dracut-initqueue timeout - starting timeout scripts [ 182.656146] dracut-initqueue[376]: Warning: dracut-initqueue timeout - starting timeout scripts [ 183.167306] dracut-initqueue[376]: Warning: dracut-initqueue timeout - starting timeout scripts [ 183.678755] dracut-initqueue[376]: Warning: dracut-initqueue timeout - starting timeout scripts Of course simples way is creating linux usb stick ...