Answer

How to change httpd default user from 'apache' to 'another user' in RTM v9.x:

From below example, httpd default user will be change from 'apache:apache' to 'lsfhadmin:xcit'

1. Stop RTM services:

# lsfpollerd stop
# licpollerd stop
# crond stop
# httpd stop

2. Change file/folder ownership:

# chown -R lsfhadmin:xcit /var/lib/php/session
# chown -R --from=apache lsfhadmin:xcit /opt/*

3. Change User and or Group. In each example below, replace apache with the user/group you wish to use.

# vim /etc/cron.d/cacti

==================================================================
# $Id: cacti.cron.5minutes 6412 2013-09-03 06:23:24Z yboliu $
*/5 * * * * apache php /opt/IBM/cacti/poller.php > /dev/null 2>&1
==================================================================


# vim /etc/logrotate.d/cacti

==================================================================
# $Id: cacti 6412 2013-09-03 06:23:24Z yboliu $
/opt/IBM/cacti/log/cacti.log {
missingok
weekly
notifempty
compress
create 0664 apache apache
}
==================================================================

# vim /etc/httpd/conf/httpd.conf

==================================================================                                                                        
# See <URL:http://httpd.apache.org/docs/2.2/> for detailed information.
# <URL:http://httpd.apache.org/docs/2.2/mod/directives.html>
# (available at <URL:http://httpd.apache.org/docs/2.2/mod/mpm_common.html#lockfile>);
User apache
Group apache
# http://httpd.apache.org/docs/2.2/mod/core.html#options
# e.g., www.apache.org (on) or 204.62.129.132 (off).
# http://httpd.apache.org/docs/2.2/mod/core.html#enablemmap
# http://httpd.apache.org/docs/2.2/mod/core.html#enablesendfile
# See http://httpd.apache.org/docs/2.2/mod/mod_cache.html for more details.
# <URL:http://httpd.apache.org/docs/2.2/vhosts/>
==================================================================

4. Change the "Daemon_User" account

# vim /opt/IBM/rtm/etc/lsfpollerd.conf

==================================================================
# $Id: grid.conf 6412 2013-09-03 06:23:24Z yboliu $
# +-------------------------------------------------------------------------+
# | (C) Copyright International Business Machines Corp, 2006-2013. |
# | |
# | This program is distributed in the hope that it will be useful, |
# | but WITHOUT ANY WARRANTY; without even the implied warranty of |
# | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
# | GNU General Public License for more details. |
# +-------------------------------------------------------------------------+
# | Settings |
# +-------------------------------------------------------------------------+
# | DB_Host 'localhost' or socket file for unix |
# | IP Address for Windows |
# | DB_Database Database name, typically 'cacti' |
# | DB_Port The database port to use |
# | DB_User The user to access the database, typically 'cactiuser' |
# | DB_Pass The password for the Cacti user |
# | DB_Pollerid The unique id for the poller. This must match the poller |
# | id's in the Cacti database. |
# | Log_File Path to local log file to registers events and errors to |
# | Path_LMSTAT Path to the license tracking tool lmstat |
# +-------------------------------------------------------------------------+
DB_Host localhost
DB_Database cacti
DB_User cacti
DB_Pass admin
DB_Port 3306
DB_Pollerid 1
Log_File /opt/IBM/cacti/log/cacti.log
Daemon_User apache
==================================================================

# vim /opt/IBM/rtm/etc/lic.conf

==================================================================
# $Id: lic.conf 6412 2013-09-03 06:23:24Z yboliu $
# +-------------------------------------------------------------------------+
# | (C) Copyright International Business Machines Corp, 2006-2013. |
# | |
# | This program is free software; you can redistribute it and/or |
# | modify it under the terms of the GNU Lesser General Public License |
# | as published by the Free Software Foundation; either version 2.1 |
# | of the License, or (at your option) any later version. |
# | |
# | This program is distributed in the hope that it will be useful, |
# | but WITHOUT ANY WARRANTY; without even the implied warranty of |
# | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
# | GNU General Public License for more details. |
# +-------------------------------------------------------------------------+
# | Settings |
# +-------------------------------------------------------------------------+
# | DB_Host 'localhost' or socket file for unix |
# | IP Address for Windows |
# | DB_Database Database name, typically 'cacti' |
# | DB_Port The database port to use |
# | DB_User The user to access the database, typically 'cactiuser' |
# | DB_Pass The password for the Cacti user |
# | Log_File Path to local log file to registers events and |
# | errors to |
# | Path_LMSTAT Path to the license tracking tool lmstat |
# | Poller_Loc Location label for identifying Remote Poller |
# | Offline_Mode 1=Store and Forward, 0=No Offline Mode |
# | Offline_Data Offline Data store path, root writable |
# | Offline_DB Offline SQLite DB file for Store and Forward |
# | Offline_Agent Offline Agent executable to re-populate offline data |
# | to MySQL when recovers |
# +-------------------------------------------------------------------------+
DB_Host localhost
DB_Database cacti
DB_User cacti
DB_Pass admin
DB_Port 3306
Log_File /opt/IBM/cacti/log/cacti.log
Path_LMSTAT /opt/IBM/flexlm/bin/lmstat
Poller_Loc local
Offline_Mode 0
Offline_Data /opt/IBM/rtm/lic/offline/data
Offline_DB /opt/IBM/rtm/lic/offline/lic_servers.db
Offline_Agent /opt/IBM/rtm/lic/bin/licofflineagent
Daemon_User apache
==================================================================    

This command will sequentially open multiple versions of grid.conf file where you must change the daemon user.

# find /opt/IBM/rtm/ -name grid.conf -exec vim {} \;

5. Start RTM services:

# lsfpollerd start
# licpollerd start
# crond start
# httpd start