I am logged in as root in a freebsd (10) box and I am trying to execute a script (or any command) as another user, but I get: "su: Sorry"
root@vm ~ # whoami
root
root@vm ~ # cat /etc/passwd
#...
myuser:*:1001:1001:my name:/home/myuser:/usr/local/bin/bash
#...
root@vm ~ # su -m myuser -c '/bin/ls /tmp'
su: Sorry
root@vm ~ # su -m myuser
su: Sorry