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Restart the machine, when grub shows the menu, immediately press arrow key to hold the boot session and select O/S and press "e" and select the line which is showing "kernel /vmlinuz...." press "e" and type either "1" or "single" in the end of the line after giving a space. press enter and then press "b" to boot. It take a while and now you are in single usermode with root prompt. Just type "passwd root" give your new password. Thats it. It works only then if grub is not protected by password.
Originally Posted by srinivasmmdl
i forgot my fedora root password how can i get my password or how to reset new password
Distribution: Ubuntu 11.4,DD-WRT micro plus ssh,lfs-6.6,Fedora 15,Fedora 16
1) boot from live cd
2) switch to root prompt (su -)
3) create a directory such as /system (# mkidr /system)
4) mount system volume on that directory (eg: # mount /dev/sda1 /system)
5) # mount --bind /sys /system/sys
6) # mount --bind /proc /system/proc
7) # mount --bind /dev /system/dev
8) # chroot /system
9) # passwd or # passwd root
10) # reboot