If your memory or mistyping leaves you without the right password to get into an account on a Linux computer, there’s no need to reformat. You’ll just need to reboot into single user mode to reset it. Here’s how to do it on a typical Ubuntu machine with the GRUB bootloader:
- Reboot the machine.
- Press the ESC key while GRUB is loading to enter the menu.
- If there is a ‘recovery mode’ option, select it and press ‘b’ to boot into single user mode.
- Otherwise, the default boot configuration should be selected. Press ‘e’ to edit it.
- Highlight the line that begins with ‘kernel’. Press ‘e’ again to edit this line.
- At the end of the line, add an additional parameter: ‘single’. Hit return to make the change and press ‘b’ to boot.
The system should load into single user mode and you’ll be left at the command line automatically logged in as root. Type ‘passwd’ to change the root password or ‘passwd someuser’ to change the password for your “someuser” admin account.
Once your done, give the three finger salute, or enter ‘reboot’ to restart into your machine’s normal configuration.
That’s all there is to it. Now just make sure to write your password down on a post-it and shove it somewhere safe like under your keyboard. 🙂
[ Source: Hackzine.com ]
The steps are not too difficult but I did have to find a few places for information. Search on the forum turn up nothing on this subject so hopefully this HOWTO would be helpful to someone out there.
Note: This is not using the OSE version.
VirtualBox has a very good GUI running on the host to manage guest OS. However when running a server, we typically do not want to run X on it. Fortunately VirtualBox has commandline tools to manage guest systems. It also provides the VirtualBox Remote Desktop Protocol (VRDP) to allow connection to the guest remotely.
Clarification of terms used:
Host – refers to the machine we are trying to install VirtualBox.
Guest – the VirtualBox guest system that is setup on the host.
Remote – the PC that we are working on to connect to the host via SSH.
This setup was done on a fresh install of Ubuntu Server 8.04 with openssh-server installed.
All the following steps are done by SSH into the host from a remote (I’m using Windows for now).
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[ Source: Google Chrome ]