Doesn't work for me:

```
jclarke@rudder-snapshot:~$ ps axf | grep cf-execd
11559 pts/0    S+     0:00              \_ grep cf-execd
 5790 ?        Ss     0:01 /var/rudder/cfengine-community/bin/cf-execd
 5807 ?        Ss     0:01 /var/rudder/cfengine-community/bin/cf-execd
jclarke@rudder-snapshot:~$ killall /var/rudder/cfengine-community/bin/cf-execd
/var/rudder/cfengine-community/bin/cf-execd: no process found
```