Now I am using AX3 for my work, but now the ubuntu grub is boot up everytime and I need to choose the entry manually every time. so I need to change grub. 1. cd /mnt/ubuntu 2. mount -t ext3 /dev/sda1 boot/ 3. cd boot/grub/ 4. vim menu.lst —timeout 100 +++timeout 1 5. mv the AX3 entry to the beginning 7. done