11i and R12 file locations

Important File Locations 
File
Oracle Apps 11i
Oracle Apps R12
Environment Source file
APPSORA.env
APPS<SID>_<hostname>.env
Context File (Middle tier)
$APPL_TOP/admin/$TWO_TASK.xml
$INST_TOP/appl/admin/$TWO_TASK_<hostname>.xml
tnsnames.ora (OH)
$ORACLE_HOME/network/admin/<CONTEXT>
$INST_TOP/ora/10.1.2/network/admin
listener.ora
$ORACLE_HOME/network/admin/<CONTEXT>
$INST_TOP/ora/10.1.2/network/admin
appsweb.cfg
$OA_HTML/bin
$INST_TOP/ora/10.1.2/forms/server
tnsnames.ora (Apache)
$IAS_ORACLE_HOME/network/admin/<CONTEXT>
$INST_TOP/ora/10.1.3/network/admin
jsev.properties
$IAS_ORACLE_HOME/Apache/Jserv/etc
$INST_TOP/ora/10.1.3/opmn/conf/opmn.xml
httpd.conf
$IAS_ORACLE_HOME/Apache/Apache/conf
$ORA_CONFIG_HOME/10.1.3/Apache/Apache/conf
apps.conf
$IAS_ORACLE_HOME/Apache/Apache/conf
$ORA_CONFIG_HOME/10.1.3/Apache/Apache/conf
formservlet.ini
$IAS_ORACLE_HOME/Apache/Jserv/etc
$ORACLE_HOME/forms/server/default.env
topfile.txt
$APPL_TOP/admin
$APPL_CONFIG_HOME/admin
adovars.env
$APPL_TOP/admin
$APPL_CONFIG_HOME/admin
adjborg2.txt
$APPL_TOP/admin
$APPL_CONFIG_HOME/admin
SSL Certificates
$COMMON_TOP/admin/certs
$INST_TOP/certs
AD scripts logs
$COMMON_TOP/admin/log/<SID_hostname>
$LOG_HOME/appl/admin/log
Concurrent Request logs
$APPLCSF
$APPLCSF
Apache logs
$IAS_ORACLE_HOME/Apache/Apache/logs
$LOG_HOME/ora/10.1.3/Apache
Jserv logs
$IAS_ORACLE_HOME/Apache/Jserv/logs
$LOG_HOME/ora/10.1.3/j2ee
javacache.log
$COMMON_TOP/rgf/<SID_hostname>
$LOG_HOME/appl/rgf


Environmental variables 
Variable
Oracle Apps 11i
Oracle Apps R12
APPL_TOP
$HOME/<SID>appl
$HOME/apps/apps_st/appl
COMMON_TOP
$HOME/<SID>comn
$HOME/apps/apps_st/comn
ORACLE_HOME (applmgr)
$HOME/<SID>ora/8.0.6
$HOME/apps/tech_st/10.1.2
IAS_ORACLE_HOME
$HOME/<SID>ora/iAS
$HOME/apps/tech_st/10.1.3
ORACLE_HOME (oracle)
$HOME/<SID>db/10.2.0
$HOME/db/tech_st/10.2.0
ORADATA
$HOME/<SID>data
$HOME/db/apps_st/data
JAVA_TOP, OA_JAVA
$COMMON_TOP/java
$COMMON_TOP/java/classes
OA_HTML
$COMMON_TOP/html
$COMMON_TOP/webapps/oacore/html
FND_SECURE
$FND_TOP/secure/<SID>
$INST_TOP/appl/fnd/12.0.0/secure
ADMIN_SCRIPTS_HOME
$COMMON_TOP/admin/scripts/<SID>
$INST_TOP/admin/scripts
LOG_HOME
-
$INST_TOP/logs
FORMS_WEB_CONFIG_FILE
-
$INST_TOP/ora/10.1.2/forms/server/appsweb.cfg
AF_JLIB
-
$COMMON_TOP/java/lib
JAVA_BASE
-
$COMMON_TOP/java
INST_TOP
-
$HOME/inst/apps/<CONTEXT>
ORA_CONFIG_HOME
-
$INST_TOP/ora
APPLCSF
$COMMON_TOP/admin
$LOG_HOME/appl/conc