These are just some hints. For more details please consult the manual.

How to get the VIOS level:

padmin@vio~$ ioscli ioslevel
2.1.3.10-FP-23

How to configure new devices (the equivalent of cfgmgr under root):

padmin@vio~$ cfgdev

How to list the unmapped disks:

padmin@vio~$ lspv -free

How to list adapter id:

padmin@vio~$ lsmap -all|grep 102

How to list vio adapter devices:

padmin@vio~$ lsmap -vadapter vhost2

How to remove a virtual device:

padmin@vio~$ rmvdev -vtd vroota10_02

How to remove vio device:

padmin@vio~$ rmdev -dev vhost2

How to become root:

padmin@vio~$ oem_setup_env

How to list hdisks attached to vio (run the command as root):

root@vio~# mpio_get_config -Av

How to create virtual optical adapter:

padmin@vio~$ mkvdev -fbo -vadapter vhost17 -dev vcdrom_a06

How to create a disk backing device by specifying a name:

padmin@vio~$ mkvdev -vdev hdisk30 -vadapter vhost17 -dev server_size_number

How to list repository (installation media, for example):

padmin@vio~$ lsrep

How to load virtual optical media disk:

padmin@vio~$ loadopt -disk aix61_0102_dvd -vtd vcdrom_a06

How to check the priority and status of SEA:

padmin@vio~$ entstat -all entX | grep Priority

[NPIV] How to check the vfchost adapter slot number and status:

padmin@vio~$ lsmap -all -npiv

[NPIV] How to list the ports that are capable of N_Port ID virtualization (NPIV-capable ports):

If the fabric attribute is set to 1 it means the adapter and the SAN switch are NPIV ready.
padmin@vio~$ lsnports

[NPIV] How map virtual fiber channel server adapter to the physical fc adapter fcs0:

padmin@vio~$ vfcmap -vadapter vfchost0 -fcp fcs0

Wondering what AIX commands a padmin command runs?

padmin@vio~$ [color=green]export CLI_DEBUG=33[/color]
padmin@vio~$ lsmap -vadapter vhost0
AIX: "lsdev -c adapter -t IBM,v-scsi-host -s vdevice -F "name" | wc -l -c"
AIX: "lsdev -c adapter -t IBM,v-scsi-host -s vdevice -F "name""
AIX: "lsdev -C -l vhost0 -F "physloc""
AIX: "lsdev -p vhost0 -F "name" | wc -l -c"
AIX: "lsdev -p vhost0 -F "name""
SVSA            Physloc                                      Client Partition ID
--------------- -------------------------------------------- ------------------
vhost0          U9117.MMA.06EXXXX-V2-C20                     0x00000003

VTD                   ty7a0208_32G_01
Status                Available
LUN                   0x8100000000000000
Backing device        hdisk4
Physloc               U789D.001.DQD04X0-P1-C1-T1-W000000000110AE0F-L2000000000000
Mirrored              false

You cannot redirect stuff into a file due to padmin restrictions but you can use vi if you want to write a script or something. By the way, $HOME is in PATH. Take a look:

$ pwd
/home/padmin
$ echo "echo hello" >bah 
rksh: bah: 0403-019 The operation is not allowed in a restricted shell.
$ vi bah
$ chmod 755 bah
$ /home/padmin/bah
rksh: /home/padmin/bah: 0403-019 The operation is not allowed in a restricted shell.
$ ./bah
rksh: ./bah: 0403-019 The operation is not allowed in a restricted shell.
$ bah
hello

How to run vio command as root (NOT RECOMMENDED):

# /usr/ios/cli/ioscli lsmap -all

How to apply IOS fixes (Put the IOS fixes somewhere (e.g. /home/iosfixes), then run:

# updateios -dev /home/iosfixes -accept

How to reset VIO password from hmc with the command viosvrcmd, read here.

How to do a backup image of VIO:

# backupios -file vio1_backup_image.sysb -mksysb