Software index is broken on Ubuntu Solved Recently, I am going to install a software from Ubuntu Software Center. But, due to slow internet connection, download has not completed and package list has been broken. What a bad luck of me! I tried to download that software again from synaptic package manager but a message appear and said: Software index is broken on Ubuntu Software index is broken This is a major failure of your software management system. Please check for broken packages with synaptic, check the file permissions and correctness of the file /etc/apt/sources.list and reload the software information with: sudo apt-get update and sudo apt-get install -f. Software index is broken, application download failed and updates package-list can not open I run sudo apt-get update at terminal. When it tries to read package lists an error occurred. Look at the last lines at the image above. Several error message showing there. W: Envountered status field in a non-version description E: ...