Linux root Password Cracking Method

Article Title: Linux local root password cracking method. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.

I have summarized some local root password cracking methods for various linux versions and collected relevant information on the Internet to share with you, hoping to help you.

(1) RedHat/CentOS/Fedora system password cracking

1. Press E in the grub option menu to enter the editing mode.

2. Add S (or Single) to the last line of the kernel ).

3. Press B to start to single-user mode.

4. Run the following command:

# Mount-t proc/proc

# Mount-o remount, rw/

# Passwd

# Sync

# Reboot

(2) Debian linux system password cracking

1. In the grub option menu 'debian GNU/Linux ,... (Recovery mode) ', press e to enter the editing mode.

2. Edit the ro single at the end of the kernel line and change it to rw single init =/bin/bash. Press B to restart.

3. Run the following command:

Root @ (none) # mount-

Root @ (none) # passwd root

Root @ (none) # reboot

(3) Freebsd system password cracking

1. Start the instance and enter the boot menu.

2. Select each item (Press 4) to enter the single-user mode.

3. Enter the following command:

Root @ # mount-

Root @ # fsck-y

Root @ # passwd (password change command)

Root @ # root (username to crack the password)

Enter new unix password:

Root @ # init 6 (restart)

(4) Solaris system password cracking

1. Select the solaris failasfe item in the grub option menu.

2. The system prompts Do you wish to have it mounted read-write on/? [Y, n,?] Select y.

3. Enter the single-user mode.

4. Enter the following command: passwd.

Root @ # init 6 (restart)

(5) NetBsd system password cracking

1. Boot: When a prompt symbol appears and the last five seconds start, type the following command:

> Boot-s (command for entering single-user mode)

2. In the following prompt symbols:

Enter pathname of shell or RETURN for sh:

Press Enter.

3. type the following command:

# Mount-

# Fsck-y

4. Use passwd to change the root password.

5. Use the exit command to enter the multiplayer mode.

(6) SUSE system password cracking

1. restart the machine. After the grub boot interface appears, add init =/bin/bash to the linux Startup options, by passing the init =/bin/bash parameter to the kernel, the OS runs bash before running the login program, and the command line appears.

2. Wait for a moment (none) #: command line.

3. Enter mount-n/-o remount. rw indicates that the root file system is remounted to read/write. With the read/write permission, you can use the passwd command to change the password.

4. Enter the passwd command to reset the password.

5. After the modification, remember to use mount-n/-o remount. ro sets the root file system to the original state.