I have Ubuntu 14.04 LTS installed on a Win 7 64-bit machine via VirtualBox 5.0.14. Now I want to install a Ubuntu-based software suite called Archivematica. The instructions begin this way:
Add the archivematica/release PPA to your list of trusted repositories (if add-apt-repositories is not available you must install python-software- properties first):
sudo apt-get update sudo apt-get install python-software-properties sudo add-apt-repository ppa:archivematica/1.4
Firstly, I could not figure out how to add a trusted repository and don't know how to tell whether add-apt-repositories is available.
Secondly, when I enter the first sudo command and try to enter a password when prompted in the terminal window, no characters appear as I type.
Can anyone offer insight into these issues? Many thanks in advance.