| 1 | cat /etc/apt/sources.list | perl -ne '$H{$_}++ or print' > /tmp/sources.list && sudo mv /tmp/sources.list /etc/apt/sources.list   | 
| 1 | cat /etc/apt/sources.list | perl -ne '$H{$_}++ or print' > /tmp/sources.list && sudo mv /tmp/sources.list /etc/apt/sources.list   |