change primary IP address tutorial, have some questions in some steps

I used this tutorial to change primary IP address
/http://www.codero.com/knowledge-base/questions/248/, i have some questions in some steps

i changed IPADDR, but i dont find GATEWAY in this file, is this ok? maybe because this tutorial is old enough

so example like this 1.2.3.4:255.255.255.252:1.2.3.3
is this already correct & still needed now?

i only have 1 ip for my server, is this still needed?





thank you for the answer

 

i already rebooted the server, i dont need run those restart again right?





the tutorial link above is not completed, its forgot 1 important step, that is :
WHM > Change Site’s IP Address
damn, i still use my old ip in the last 3 hours because dont know above step, my host still put the old ip for few days until make sure all services already changed to new ip
already Change Site’s IP Address, to new ip now

which part i can check again so changing to new ip guys?

 

ah yes this already done, thank you
WHM > Edit DNS Zone

any other place guys?

 

but i already did that,
the order is reversed, "Edit DNS Zone" first, then few hours later "Change Site’s IP Address"
the tutorial above is not good enough or not completed


any other place i should check/edit guys?


btw i get this email message, its a daily cron, what should i do guys? :
curl: (6) Couldn't resolve host 'mydomain.com'

 

looks like no problem, checked on intodns too

only my visitors a little less than normal

please recommend appropiate & updated change primary ip tutorial if there any, so i can recheck

 

Hi again guys,

currently in WHM > Change Site’s IP Address, there is still old ip, beside new ip

i already emptied /etc/ips again, so removed the old ip information & service network restart too


what should i do? should i leave it there?

Nb. my host says already disable the old ip from their side

 

so it is in WHM > Show or Delete Current IP Addresses,
after i click trash icon on old ip, get this error message :


Confirm that entry for “1.2.3.4” should be deleted.
Entry for “1.2.3.4” not deleted.
The reported error message was: “Failed to remove IP address.”

screenshot :


how to solve this or which part i need to check?
already checked all in Edit DNS Zone, no old ip anymore there

 

created a ticket, since i cant solved this yet, already tried rebooted the server too
ticketid : 5995707


already contacted my host too, they said already disabled the old ip from they side
there is no problem until now with the old ip still existed like that, but please delete it if necessary