To change time zone from terminal

[apt-get upgrade] warning: The following packages have been kept back: linux-headers-generic-lts-quantal linux-headers-virtual linux-image-generic-lts-quantal linux-image-virtual linux-virtual…

In order to eliminate this warning Invalid argument: AH00076: Failed to enable APR_TCP_DEFER_ACCEP Add this…

https://help.ubuntu.com/community/CheckingYourUbuntuVersion