apt-get is not known on line 3 in source list /etc/apt/sources.list.d/grizzly.list.
When I go into this file I have to write down some commands as written in openstack manual doc's:
deb http://archive.gplhost.com/debian grizzly main deb http://archive.gplhost.com/debian grizzly-backports main apt-get update apt-get install gplhost-archive-keyring
After I've written them down, the next step is to write down another command to upgrade the system
sudo apt-get update && apt-get upgrade
but when I execute it, the error pops up every time as I mentioned above.