change_remote_passwords.py

# Requires fabric: sudo yum -y install fabric gcc python-devel python-setuptools

from fabric.api import env, task, hide, sudo

user1 = 'foo'
pass1 = 'bar'

user2 = 'baz'
pass2 = 'qux'

passwords = {
    'host1': [
        {'username': user1, 'password': pass1},
        {'username': user2, 'password': pass2}
    ],
    'host2': [
        {'username': user1, 'password': pass1},
        {'username': user2, 'password': pass2}
    ]
}
env.hosts = passwords.keys()


@task(default=True)
def change_remote_passwords():
    with hide('running'):
        for user in passwords[env.host]:
            sudo(command='echo %s| passwd %s --stdin' % (user['password'],user['username']))