FreeBSD “su: Sorry” Problem

Solving the FreeBSD “su: Sorry” Problem

The solution is to restart FreeBSD in single user mode and then make the change as root. This can be done by following the steps below:

Step 1: Restart the server, then press 2 to boot into single user mode.

Step 2: Make the file system writable by running the following command:

mount -u -w /

Step 3: Assuming your user is called sysadmin, run the following command to add the user to the wheel group:

pw usermod sysadmin -G wheel

Step 4: Restart the server and test the su command.

$ su
Password:
root@uss01:/usr/home/sysadmin #

As you can see from the output above, the su command now switches to the root user account when running it as the sysadmin user.

 

来源：

https://graspingtech.com/freebsd-fix-su-sorry-message/