Hi Laura,
I think you will find most AIX techies will for monitoring be using nmon as it is built in to AIX. I am biased as I developed nmon - the "n" is for Nigel.
There is nmon for Linux which is open source - so this is going the other way: AIX -> Open source.
nmon can save the stats to files for analysis with nmonchart graphs, other CSV graphing tools, nmon analyser or loading in to Timeseries database (like InfluxDB).
As AIX is UNIX, 99.9% of system admin and developer people will being vi, not nano.
Most people will, I think, use putty on their workstation to a server.
But from the server most would use ssh to get a remote terminal or X Windows via vncserver/vncclient.
Hope this helps,
------------------------------
Nigel Griffiths - IBM retired
London, UK
@mr_nmon
------------------------------