Installed Ubuntu Server, and then upgraded to raring Ringtail (development Branch), of course, many of the software and environment to reconfigure, so you will encounter problems. First, there are some common problems in the PPA warehouse.
For example, to install a jdk7 environment in Ubuntu Server, execute commands directly: sudo add-apt-repository Ppa:webupd8team/java
Error: Sudo:add-apt-repository:command not found
The online solution is to install the toolkit directly
Command: sudo apt-get install python-software-properties
Pro-Test after installation or command not found, so the dependency package has not been installed completely, what is less?
Execute command: Add-apt-repository, tell, in addition to install python-software-properties outside also need Software-properties-common
OK, execute the installation command: sudo apt-get install Software-properties-common
Add-apt-repository