With FreeBSD version 5.4 and above the booting procedure is slightly changed. The older version of FreeBSD uses the boot -s option at Ok prompt. However, with FreeBSD version FreeBSD 5.4+ you don't have to type any commands. Here is the procedure to boot FreeBSD into a single user mode to reset root password.
In this tip I will explain how to boot FreeBSD into a single user mode to reset root password.
Procedure: Reset FreeBSD root user password
Step # 1: Start FreeBSD server/workstation.
Step # 2: Press Enter key at boot loader.
At Welcome to FreeBSD! boot menu press spacebar key to pause default booting
Next you will see the following prompt from system:
When prompted Enter full pathname of shell or RETURN for /bin/sh:
Press Enter key to boot into a single user mode. Next, you will be immediately dropped into a single user mode without a root password.
You need to remount / (root) file system in read and write mode with mount command, type the following commands:
# mount -u /
# mount -a
Setup a new password with the passwd command for root user:
Next type exit command to boot FreeBSD into multi-user mode environment:
OR You can just reboot the system:
For more information see man pages of passwd and mount commands.