New Setup: Command Line vs ISPManager

[VPSNoob]

Ok so I'm new to ISPManager Pro. I managed to successfully install it on an Ubuntu x64 server. I have some experience setting up a server from the command line but not a lot (I learned some things from vpsbible.com).

In any case, I am confused on a few things. I'll list them below:

1) The root user. Why can't I disable it or delete it when logged in as another superuser? I've tried pressing the lightbulb to disable and/or delete. The confirmation windows come up, I press OK and nothing happens. Should I go in and disable from the command line?

2) IPtables. Why are there no configurations for port numbers? Is this again something I have to change at the command line? I heard that hackers love port 22 for SSH for example. Changing it to another random 5 digit number is a good idea as I understand it.

3) I know I can install software/modules from ISPM but can I do software upgrades from ISPManager? Or are those better done from the command line also? I went to install NGINX and notice its not even the current stable version. Do I install nginx separately on command line to current version? How about other upgrades such as the kernel (I use Ksplice for that), PHP and

4) How do I get or know for certain that NGINX is acting as my webserver and not apache? I really don't want apache for anything but as I understand it some other programs need it. I just dont want it to be my webserver.

All in all, are changes at the command line going to screw up ISPManager or will it adopt?

[vian]

1) You cannot disable 'root' user.
2) ISPmanager does not support such a feature, but you can do it manually.
3) ISPmanager do not upgrade installed OS also it only installs software that your OS's repository supports.
4) If nginx acts as a frontend it will use 80 port at the same time apache will use other port, smth like 8080.

In any case ISPmanager will adopt any changes you will do.