After changing hosting provider of a phpBB forum you may face few problems. You need to delete all contents of /cache folder. Make sure this folder is writable.
Host your blog in wordpress platform rather than blogger. If you ever migrated your existing blog from blogger to wordpress, you need to fix permalink structure.
If you like to change category or tag in wordpress in Nginx server, you need to use rewrite rules in your /etc/nginx/sites-available/example.com.
To set up pretty permalink in wordpress in a LEMP environment you should add the following line inside location / block: try_files $uri $uri/ /index.php?q=$uri&$args;
Your PHP installation appears to be missing the MySQL extension which is required by WordPress. Run: apt-get install php5-mysql in hosting account.
After changing hostname of your VPS, you need to restart VPS (Type sudo reboot in command line). This will solve the issue, “Unable to resolve hostname”.