Nameservers with GoDaddy
I've been trying to change my nameservers in my godaddy account since I migrated my hosting to linode, the problem is, there is only maximum of 3 nameservers that are being accepted for .PH domain (https://in.godaddy.com/help/about-ph-domains-8854#2).
Is it ok just to use only 3 when linode provide 5 nameservers?
Sure, you can certainly list just 2 or 3 of our name servers. Having more than a single name server provides redundancy so if one goes down, the next one down the line will handle requests. In most cases 2 name servers are sufficient, but I generally recommend listing as many of our name servers as your registrar can handle.