I am using CentOS in Virtualbox.
My testing Web is frequently down, So I think reason is low memory and want to upgrade it.
origin memory is 1024MB, and in system configuration, updraded to 2048MB.
and to sync with CentOS, what commands need??
I think only upgrading memory in virtual box useless.
Must command some code in cent or chance some file.
but I did not know how to.