how to bual boot ubuntu and fedora ?

This scenario assumes Ubuntu is currently installed, and Fedora is to be installed in a dual-boot configuration (no Windows). Install Fedora in its own partition(s) as if it were the only OS to be installed with the exception that you place the Ferdora boot loader in the Fedora root partition (not the MBR). With both Ubuntu and Fedora installed, edit the Ubuntu boot loader configuration to chain load Fedora. If I Recall Correctly, Ubuntu uses the Grub boot loader, so add a section to menu.lst as follows: title Fedora root (hdx,y) chainloader +1 Notes for the line root (hdx,y): x represents the hard drive (first hard drive = HD0, second = HD1, etc.) y represents the partition (first partition = 0, second partition = 1, etc.) I chose to explain this method first because it allows the Fedora installer to set any parameters Grub may need to successfully boot Fedora, making it the simplest to explain. You may be able to skip installing a boot loader in Fedora and use Ubuntu's Grub boot loader installation to boot Fedora directly. To do so, the section you add to Ubuntu's menu.lst will look similar to the following: title Fedora kernel (hdx,y)/boot/vmlinuz initrd (hdx,y)/boot/initrd.img Notes: x represents the hard drive (first hard drive = HD0, second = HD1, etc.) y represents the partition (first partition = 0, second partition = 1, etc.) the vmlinuz file may be kernel version specific (vmlinuz-2.6.x.x) I use neither Ubuntu or Fedora here, and the Fedora section (second method) may require additional parameters. HTH, Ernie Registered Linux User 247790