upgrade ubuntu 12.04.5 to 14.04.5 with ispconfig3 and some websites installed, but have problems

Dear Howtoforge,
I updated the ispconfig3 system with some websites installed under ubuntu 12.04.5 to 14.04.5. The ubuntu upgrade is ok, but can't access the website as before.
When upgrade ubuntu, I just run apt-get update && apt-get dist-upgrade && do-release-upgrade and that's it. could this cause any problems for access the website installed through ispconfig3? what is the appropriate steps to upgrade ubuntu and still can access the website as before upgrade ubuntu?
thank you very much.
best regards,
q.d.s.

 

Have you followed that distro upgrade with ISPC update as well?

 

where can find the information for distro upgrade with ispc update? thanks.

 

Just type ispconfig_update.sh from your terminal to run ISPC update.

 

yes you're correct, haven't done the ispconfig update for a couple of years, didn't check the manual. try to get a latest manual from the them to refresh my mind. thanks.