Installed Oracle 9i on RH Fedora Core 1. Now what?

Question

From the instructions on http://www.oracle-base.com/Articles/9i/Oracle9iInstallationOnFedora1.php and http://otn.oracle.com/tech/linux/htdocs/oracleonlinux_faq.html
I managed to install Oracle 9i on Linux, and have set up an ssh server, and use putty to access Oracle 9i from the windows machine at work. Works great (even though the web server don't start automatically allways on reboot).
But can people who actually work as system administrators tell me what I should do next. My education is as a programmer and building engineer, so I have gotten no administration experience. What is the next logical step an real administrator would do now (except the obvious thing as reading the 103567 pages of manuals that comes with Linux and Oracle)? I have done the following:
Set up ssh, downloaded putty for the windows user and work. Also installed vnc server (but have not understood how to make it work yet (from a windows machine)). Made all the passwords minimum 10 characters long with mix upper / lower case, with symbols and numbers mixed in.
Played around with the Fedora firewall. It is not very good though, so I turned it off (still have a firewall in my router... but like to have top security). If I use the firewall wizard, it only gives me very limited options (port 21, 22, 80 and two more), and the creation of a manual firewall file is way beyond me (yet). Like, I know that ssh uses port 22 and web server uses port 80, but what about nightly yum, up2date, messaging client, Wolfenstein ET etc?
And do real Linux administrators use some kind of virus protection like windows machines has?
Or is it some Linux or Oracle admin tool that is widly regarded as being good to have amoung administrators.
Or does my very limited knowledge of administration leave some huge holes in the defences?, that lets hackers simply walk straight into my computer and stuff around.
And with up2date and yum. How do I know that the updates I receive is safe from trojans etc. How do I know they are stable. Is it some place that guaranties "trojan free and stable" updates. (I have turned on something called nightly yum, and my best guess is that it does something, because the up2date icon in the gnome desktop is blue with a tick in it (I have ignored some perl updates since I don't use perl)).
And if (against all odds) my home made hobby type business should be a sucess (and I can leave my slow government job and work on web/database development :) ) , how can I contribute to the Linux community for everything it has done to me (in a way that would be to the best for the Linux community). (After paying Oracle...) (And a bit to RedHat for Fedora).

Answer 1

From the instructions on http://www.oracle-base.com/Articles/9i/Oracle9iInstallationOnFedora1.php and http://otn.oracle.com/tech/linux/htdocs/oracleonlinux_faq.html
I managed to install Oracle 9i on Linux, and have set up an ssh server, and use putty to access Oracle 9i from the windows machine at work. Works great (even though the web server don't start automatically allways on reboot).
But can people who actually work as system administrators tell me what I should do next. My education is as a programmer and building engineer, so I have gotten no administration experience. What is the next logical step an real administrator would do now (except the obvious thing as reading the 103567 pages of manuals that comes with Linux and Oracle)? I have done the following:
Set up ssh, downloaded putty for the windows user and work. Also installed vnc server (but have not understood how to make it work yet (from a windows machine)). Made all the passwords minimum 10 characters long with mix upper / lower case, with symbols and numbers mixed in.
Played around with the Fedora firewall. It is not very good though, so I turned it off (still have a firewall in my router... but like to have top security). If I use the firewall wizard, it only gives me very limited options (port 21, 22, 80 and two more), and the creation of a manual firewall file is way beyond me (yet). Like, I know that ssh uses port 22 and web server uses port 80, but what about nightly yum, up2date, messaging client, Wolfenstein ET etc?
And do real Linux administrators use some kind of virus protection like windows machines has?
Or is it some Linux or Oracle admin tool that is widly regarded as being good to have amoung administrators.
Or does my very limited knowledge of administration leave some huge holes in the defences?, that lets hackers simply walk straight into my computer and stuff around.
And with up2date and yum. How do I know that the updates I receive is safe from trojans etc. How do I know they are stable. Is it some place that guaranties "trojan free and stable" updates. (I have turned on something called nightly yum, and my best guess is that it does something, because the up2date icon in the gnome desktop is blue with a tick in it (I have ignored some perl updates since I don't use perl)).
And if (against all odds) my home made hobby type business should be a sucess (and I can leave my slow government job and work on web/database development :) ) , how can I contribute to the Linux community for everything it has done to me (in a way that would be to the best for the Linux community). (After paying Oracle...) (And a bit to RedHat for Fedora).