(BackTrack:
Lesson 7)
{ Use BackTrack Grub to boot into
single user mode }
Section 0. Background
Information |
- Background information.
- Lets say you lost the root password and you
have no way to figure it out. No problem. All you simply
have to do is to physically power off the BackTrack machine and power it back on.
During the start of the reboot,
HOLD DOWN on the "shift" key.
If you are using VMware, you will need to click in the Black VMware
window before reboot and then
HOLD DOWN on the "shift" key.
- Prerequisite
-
Lab Notes
- In this lab we will do the following:
- We will access the Grub menu during
the boot process.
- We will edit the Grub menu to boot into
single user mode.
- We will change the root password.
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- In addition, this is a teaching website
that does not condone malicious behavior of
any kind.
- You are on notice, that continuing
and/or using this lab outside your "own" test environment
is considered malicious and is against the law.
- © 2012 No content replication of any kind
is allowed without express written permission.
Section 1: Start
BackTrack |
- Start VMware Player
- Instructions
- For Windows 7
- Start --> All Programs --> VMware
Player
- For Windows XP
- Starts --> Programs --> VMware
Player
- Start Up BackTrack.
- Instructions:
- Start Up your VMware Player
- Play virtual machine
Section 2: Boot to
Grub 2 Menu |
- Boot to Grub 2 Menu
- Instructions
- Once you see the below vmware screen,
(1) Left Click in the screen and (2)
HOLD DOWN
on the <Shift> key.
- The Grub 2 Menu
- Informational
- Below is the Grub 2 menu.
- Continue to Next Section.
Section 3: Use Grub
to Boot into Single User Mode |
- Edit the Grub Menu
- Instructions
- Make sure Ubuntu, with Linux
2.6.39.4 is highlighted.
- Press "e".
- Cursor Placement
- Instructions
- Cursor down to the line that
starts with "linux /boot/vmlinuz-2.6.39.4".
- Cursor right until the cursor is
positioned at the end of the line. In my case, my cursor is
directly after vga=791.
- Continue to next step.
- Delete "o quite splash vga=791"
- Instructions
- Use the backspace key to delete the
following characters:
- Continue to next step.
- Add the string "w init=/bin/bash"
- Instructions
- Type the follow string after the "r".
- Press <Ctrl> and "x" to boot to single
mode.
- Welcome to root (Got
Root?)
- Informational
- You are now the root user.
Congrats!!!
- Continue to next section.
Section 4: Reset the
root password |
- Reset root's password
- Instructions
- passwd root
- Supply the password of your choice.
- Sync and Reboot
- Instructions
- sync
- reboot -f
- Login with New Reset Root Password
- Instructions
- bt login: root
- Password:
<Provide
the New Reset Root Password>
- Start Graphical Interface
- Instructions
- startx
- Open a console terminal
- Instructions:
- Click on the console terminal
- Proof of Lab
- Instructions:
- chage -l root
- Where (-l)
is a lowercase L.
- date
- echo "Your Name"
- Replace the string "Your Name" with
your actual name.
- e.g., echo "John Gray"
-
Proof of Lab Instructions
- Press both the <Ctrl> and <Alt> keys at
the same time.
- Do a <PrtScn>
- Paste into a word document
- Upload to Moodle
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