EXTENDED HISTORY SEPARATELY FOR EACH USER:

HISTSIZE = Maximum size of the history file
HISTFILE = Location/filename used to record commands executed.

vi /etc/profile:

###Secondary Logging Start###

From="`/usr/bin/who am i | awk '{ print $1 }'`"
To="`/usr/bin/whoami | awk '{ print $1 }'`"
File="$From:$To"
if [ ! -d /var/adm/history/$To ]
then
mkdir -p /var/adm/history/$To
chmod 700 /var/adm/history/$To

export HISTFILE=/var/adm/history/$To/.sh_history.$File
export EXTENDED_HISTORY=ON
export HISTSIZE=10000
export HISTDATEFMT=%d-%m-%y.%H:%M:%S
alias smit='smit -l ~${HOME}/smit.log.${From}.$(date +"%d-%m-%y.%H:%M") -s ~${HOME}/smit.script.${From}.$(date +"%d-%m-%y.%H:%M")'
alias smitty='smitty -l ~${HOME}/smit.log.${From}.$(date +"%d-%m-%y.%H:%M") -s ~${HOME}/smit.script.${From}.$(date +"%d-%m-%y.%H:%M")'
fi