error-while-unstack.sh

xxx@ubuntu:~/devstack$ ./unstack.sh
Site keystone disabled.
To activate the new configuration, you need to run:
  service apache2 reload
 * Stopping web server apache2                                                apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
 ... waiting .....                                                     [ OK ]
 * Starting web server apache2                                                apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
                                                                       [ OK ]
pkill: 36458 - Operation not permitted
 * Stopping web server apache2                                                apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
 ... waiting .                                                         [ OK ]
tgt stop/waiting
tgtadm: can't send the request to the tgt daemon, Transport endpoint is not connected
stop: Unknown instance:
/home/xxx/devstack/lib/neutron: line 659: 43963 Killed                  sudo pkill -9 -f neutron-ns-metadata-proxy
sudo: ovs-vsctl: command not found
sudo: ovs-vsctl: command not found