To add a user to the "wheel" group on a FreeBSD system, you can use the pw command with the usermod subcommand.
For example, to add the user "john" to the "wheel" group, you can use the following command:
pw usermod john -G wheel
This will add the user "john" to the "wheel" group.
Note: Make sure to replace "john" with the actual username of the user you want to add to the "wheel" group.
You can find more information about the pw command and its options in the pw documentation or by running the pw --help command.
Alternatively, you can use the usermod command with the -G option to add a user to a group. For example:
usermod -G wheel john
This will add the user "john" to the "wheel" group.
You can find more information about the usermod command and its options in the usermod documentation or by running the usermod --help command.
You can also use the usermod command with the -a option to add a user to a supplementary group. For example:
usermod -a -G wheel john
This will add the user "john" to the "wheel" group as a supplementary group.
You can find more information about supplementary groups in the FreeBSD documentation or by searching online.