Install addrepo

# apt-get install hubzero-addrepo

The web process needs to be able to run a number of scripts as the "apps" user. To do this it is necessary to configure sudo to allow this:

Edit /etc/sudoers and add the following lines

www-data        ALL=(apps)NOPASSWD:/bin/bash /www/myhub/components/com_contribtool/scripts/*tool.php *
www-data        ALL=(apps)NOPASSWD:/usr/bin/expect /www/myhub/components/com_contribtool/scripts/*tool.php *
www-data        ALL=NOPASSWD:/etc/init.d/apache2

Be sure to replace "/www/myhub" with the document root you are using for your hub.