Description: This video is all about resetting password in ubuntu. In demo password is reset for an account where password is forgotten and can not log into the system in Ubuntu Linux.
Computer is restarted and select the recovery mode from the grub boot options. From there the root user prompt is selected and change the password using the passwd command.
We can also load the /etc/passwd file using the cat command to view the user accounts for the system.
Source : lecturesnippets from Youtube
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I think process will be nearly same for Red Hat and fedora ??
There may be password in grub also ???
Then you need to boot from original cd .
Yes Bhoith You can apply same process on Red Hat And Fedora.