Hi Shashank,
Check audit log in /var/log/audit
https://support.f5.com/csp/article/K5532
About audit logging
Audit logging is an optional feature that logs messages whenever a BIG-IP® system object, such as a virtual server or a load balancing pool, is configured (that is, created, modified, or deleted). The BIG-IP system logs the messages for these auditing events in the file /var/log/audit.
There are three ways that objects can be configured:
- By user action
- By system action
- By loading configuration data
Whenever an object is configured in one of these ways, the BIG-IP system logs a message to the audit log.
Regards