After migrating, phpbb asks for a module, what is this module?

Question

phpBB

After transferring the database and files of the forum, it writes an error:

General Error
Could not find required extension [apc] for the ACM module apc.

What module is missing?
And where to install it?

Answer 1

it is written - you need the extension apc .
then smoke how to put it in your axis. for ubuntu and php5 installation looks likesudo apt-get install php5-apcu