I am using Redhat Linux 5. I forgot the root password i set while installing linux OS. After rebooting right after the installation, entering root password is needed of course. So the following is what i did: I couldn't reset root password from "grub" after booting using single user mode. After writing command "passwd",instead of asking to input new unix password,it went like:
"changing password for user root. passwd: authentication token manipulation error"
It skips the following
"Asking to input root password. Then it returns authentication token manipulation error"
Any idea why it is doing so? This is the first time i do resetting root password via grub. The parameter i passed are "single" and "selinux=0" to disable SELINUX policy loading since it was halting when the SELINUX is not disabled.