Newbie Question

1) I'm using redhat9, how can i actually add IP addresses to the network card, or the eth0? Assuming i got some IPs on the server, and connecting to server via SSH. And i want to add more IPs to the server

2) The default SSH port is 22. How can i go about changing it to other ports?

3) How am i about to create a "sub root", to be able to add/remove accounts via SSH? Perhaps also access to certain root directories. Any possibility?

4) I would like to access to my PC via SSH, if i am outside. Is there possibility to do so? How can i do that then?

Hope it's not that bad to ask these. Thanks.

 

 

 

 

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