install ubuntu on virtualbox killed process

If you are using command line, check if an application like Software Center, Software Updater, Synaptic package manager, Gdebi is running any update/installation.

The first thing you should do is to check if some other program could be running system update or installing a program. Let’s see what steps can you take to fix this issue of ‘unable to lock administration directory’. This locking is done so that two processes don’t change the content at the same time as it may lead to unwarranted situation and a possible broken system. When a command or application is updating the system or installing a new software, it locks the dpkg file (Debian package manager). You see this error because some other program is trying to update Ubuntu.

Fixing “Unable to lock the administration directory (/var/lib/dpkg/)” error These errors are very similar to another common Ubuntu error, Unable to lock directory /var/cache/apt/archives/, and the interesting thing is that the fixes are similar as well. Could Not Get Lock Error in Ubuntu Software Center

Install ubuntu on virtualbox killed process