How to setup SSH in AIX to communicate with HMC

Download authorized_keys2 file from HMC
scp hscroot@HMC:/home/hscroot/.ssh/authorized_keys2 authorized_keys2_HMC

Add public key of your user on host:
cat ~/.ssh/id_rsa.pub >> authorized_keys2_HMC

Upload authorized_keys2_HMC file back to HMC
scp authorized_keys2_HMC hscroot@HMC:/home/hscroot/.ssh/authorized_keys2

SSH to HMC to add HMC to known hosts
ssh hscroot@HMC

HMC command to list LPAR profile attributes

Log in HMC shell
List all profiles on one machine and it's CPU attributes.

for LPAR in `lssyscfg -r lpar -m MACHINE_NAME -F lpar_id | sort -n`
do
lssyscfg -r prof -m MACHINE_NAME --filter "lpar_ids=${LPAR}" -F "name:lpar_name:lpar_id:proc_mode:min_proc_units:desired_proc_units:max_proc_units:min_procs:desired_procs:max_procs:sharing_mode:uncap_weight" --header
done

Useful HMC key combintaions: Switch to shell, restart xserver

CTRL-ALT-F1: Switch to Linux command line; no login possible. If you then click on CTRL-ALT-DEL the system will reboot.
CTRL-ALT-F2: Takes you back to the Xserver window.
CTRL-ALT-BACKSPACE: Kills of the Xserver and will start a new -fresh- one, so you can login again.

vtmenu - Open virtual console from SSH on HMC

Here is short how to "open vitual console from SSH on HMC"

Login to HMC ant type vtmenu:

hscroot@hostname:~> vtmenu

 Retrieving name of managed system(s) . . . Server-xxxx-xxx-xxxxxxxxx

 ----------------------------------------------------------

  Partitions On Managed System:  Server-xxxx-xxx-xxxxxxxxx

  OS/400 Partitions not listed

 ----------------------------------------------------------

   1)    Partition name                           Running

   2)    Partition name                           Running