A´m using de tutorial: "Installing ROS Indigo on Raspberry Pi", all goes well before the point 1.2

A put in ssh terminal: $ sudo apt-get install python-setuptools python-pip python-yaml python-argparse python-distribute python-docutils python-dateutil python-setuptools python-six

and I get this messege:

Reading package lists... Done Building dependency tree Reading state information... Done Note, selecting 'python2.7' instead of 'python-argparse' Package python-dateutil is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source

Package python-yaml is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source

Package python-setuptools is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source

Package python-docutils is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source

Package python-distribute is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source

E: Package 'python-setuptools' has no installation candidate E: Unable to locate package python-pip E: Package 'python-yaml' has no installation candidate E: Package 'python-distribute' has no installation candidate E: Package 'python-docutils' has no installation candidate E: Package 'python-dateutil' has no installation candidate E: Package 'python-setuptools' has no installation candidate E: Unable to locate package python-six