How can I access Ubuntu Server using MySQL Workbench and FileZilla so that I can work on database and files from local Windows PC?
For filezilla, you need to setup an FTP server. https://help.ubuntu.com/12.04/serverguide/ftp-server.html It will allow you to connect to your instance by using port 21. IP:21. But warning, FTP alone can be a security issue, especially if this server is accessible by external IP.
As for MySQL Workbench http://dev.mysql.com/doc/workbench/en/wb-new-server-instance-wizard.html It looks like it relies on ssh connection. So you'll need to setup an ssh server on that machine as well. https://help.ubuntu.com/11.04/serverguide/openssh-server.html I think you might need to run " /etc/init.d/mysql status" like the first contributor mentioned. SSH might not be enough.
I don't know if mysql is already setup on that server but take a look at this as well https://help.ubuntu.com/11.04/serverguide/mysql.html