How to reset root password in CentOS 7
If you lost your CentOS 7 VPS or server password, you can reset root password of CentOS 7 in less than 5 minutes with console access. 1- Restart the system (hard reset or by pressing the ctrl + alt + delete) and switch to the boot grub menu. During the start up, there will be […]
Change SSH password

At a command prompt, type:
Change Windows 2003 and Windows 2008 admininstrator password
This is the old version, to read the new version please read Change Windows password .