Important Files and their locations

1.$DomainHome/$serverName/bin
Descrition:
Contains all the shell script files which is being used to start/stop and contains configuration for Admin and Managed servers.

Important Files:
setDomainEnv.sh
startWebLogic.sh
stopWebLogic.sh

2.$DomainHome/$serverName/config
Descrition:
Contains configuration files all important components e.g.  Domain configurtaion,  JMS, JDBC etc

Important Files:
config.xml
jdbc config files
jms config files
fmwconfig files etc

3.$DomainHome/$serverName/osb/config
Description:
This directory mainly contains all the OSB artifats e.g. Proxy Services, business Services, XSD, Xquery etc, whatever we do from OSB console, most of stuff get store
here only.
All the OSB artifacts

4.$DomainHome/$serverName/osb/config/core/_static/Ref_Store
Description:
This folder contains files having reference to OSB proxy and business services which are tagged with JMS as consumer. This directory helps during cleanup process of OSB deployment. There could be multiple OSB services get tagged with queue which could cause issues, this directory contents will help to clean that.
.str files for JMS MDB artifacts

5.$DomainHome/$serverName/sbgen
Description:
This folder contains MDBs for JMS queues, which could be used for any OSB  Proxy service or JAVA application.
ear files e.g. _ALSB_1341965872872.ear

6.$DomainHome/$serverName/sbgen/alsbTempJars
Description:
This folder contains the .jar files which Proxy services are using via JAVA Callout action.
jar files  e.g. tempCreateProcess8557633063030887848.jar

7.$DomainHome/$serverName/servers/$serverName/adr
Description:
Contains all diagnostic related data, if you have configured the Weblogic Diagnostic Framework e.g. In the event of server crash a report get generated etc, in this
case a thread dumps file will generated here, also contains JMS, Datasource stats etc,  good for investigation purpose.

Important Files:
jvm_threads.txt, dms_metrics.txt

8.$DomainHome/$serverName/servers/$serverName/data/store
Description:
This directory contains the persistent file store for weblogic servers which is used for normal functionality and diagnostic functionality. Weblogic has 7 internal components e.g. JMS Messages, JTA logs, EJB Timer services, Diagnostic services etc. which uses these persistent file store.

Important Files:
_WLS_$serverName000000.DAT
_WLS_DIAGNOSTICS000000.DAT

9.$DomainHome/$serverName/servers/$serverName/data/ldap
Description:
Contains LDAP related files, contains security realm details etc.  If you delete this folder, you will lose all security realm users details exist in Weblogic Admin console.

Important Files:
EmbeddedLDAP.data
changelog.data
changelog.index etc

10.$DomainHome/$serverName/servers/$serverName/data/console
Description:
Store the Admin console preference.

Important Files:
ConsolePreferences.xml

11.$DomainHome/$serverName/servers/$serverName/security
Description:
This file contains encrypted weblogic username and password, used while starting the server.

Important Files:
boot.properties

12.$DomainHome/$serverName/servers/$serverName/tmp
Description:
This folder contains all the artifacts which is been deployed in servers, alternatively can be seen from "deployment" section from Weblogic Admin Server console, included JMS MDB artifacts as well.
All the Library like this

Important Files:
adf.oracle.businesseditor
adf.oracle.domain etc
ALSB Logging
ALSB Publish
em
File Transport Provider components etc

13.$DomainHome/$serverName/servers/stage
Description:
This is stagging directory, during server startup process, JMS MDB, J2EE, War application get copied from Admin server to Managed server at this stage directory and then Managed server refer to local stage directory for deployment and things moved from Stage to 'tmp' directory. Note: for admin server you will not see this directory.

Important Files:
_ALSB_1352464196062 etc

14.$DomainHome/$serverName/servers/$serverName/logs
Description:
Contains all the logs files for troubleshooting purpose.

Important Files:
access.log,
AdminServer.log
ManagedServer.log
gc.log
domain.log
AdminServer.out
ManagedServer.out files

15.$DomainHome/$serverName/servers/sysman/log
Description:
Contains Management Service logs and trace file for troubleshooting purpose.

Important Files:
emoms.log
emoms.trc

16.$DomainHome/$serverName/servers/cache
Description:
Contains all the cached information weblogic uses directory to store cache for various components e.g. web tire related cache, JMS cache, data sources, EJB cache etc.
.class files