Unable to install box2d

Question

I run this command:

apt-get install python-box2d

and I get the following output:

E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

Answer 1

Always prefix sudo before executing any installation related command no matter if it's pip or aptik , it tells the terminal that you have the authority to make this change (installation). For example:

sudo apt-get update It's for updating your repository , and so it needs to be authorized to get executed.

Also sometimes this error occurs when some other installation is in progress and it has locked the main directory , So you just have to wait for that process or installation to get completed.