To change a user's password in FreeBSD, you can use the passwd command.
To change the password for the current user, run the passwd command without any arguments:
passwd
This will prompt you to enter your current password and then to enter your new password twice to confirm it.
To change the password for a different user, you will need to use the sudo command to run the passwd command as the root user. For example, to change the password for the john user, run the following command:
sudo passwd john
This will prompt you to enter the new password for the john user twice to confirm it.
It's important to note that the passwd command will only change the password for the local user account. If the user has a network account that is managed by a directory service, such as LDAP or Active Directory, the password will need to be changed using the appropriate tools for that directory service.
You can also use the pw command to change a user's password in FreeBSD. The pw command provides more advanced options for managing user accounts, such as setting password expiration dates and locking or unlocking accounts. Consult the pw man page for more information on how to use it.