Create a user splunk and group

root@aix01 /root> lsuser -f splunk
splunk:
        id=2500
        pgrp=staff
        groups=staff,splunk
        home=/home/splunk
        shell=/usr/bin/ksh
        login=true
        su=true
        rlogin=true
        daemon=true
        admin=false
        umask=27
        account_locked=false

        fsize=-1
        cpu=-1
        data=2139095040
        stack=65536
        core=0
        rss=1073741824
        nofiles=8192
        core_hard=0

Create a service

root@aix01 /root> odmget -q subsysname="splunkd" SRCsubsys

SRCsubsys:
        subsysname = "splunkd"
        synonym = ""
        cmdargs = "_internal_exec_splunkd"
        path = "/opt/splunkforwarder/bin/splunk"
        uid = 250
        auditid = 0
        standin = "/dev/console"
        standout = "/dev/console"
        standerr = "/dev/console"
        action = 1
        multi = 0
        contact = 2
        svrkey = 0
        svrmtype = 0
        priority = 20
        signorm = 2
        sigforce = 9
        display = 1
        waittime = 20
        grpname = "splunk"