Study Splunk

FIELDS:  This command helps to keep or remove specified fields from the search results, below command will keep just three fields in your search result. Example: | fields request, rc, pt RENAME:  This command helps to rename field(s), below command will rename a field named as service to serviceType and RC as responseCode Example: | rename service AS serviceType, RC AS responseCode REPLACE:  This command helps to replace the values of fields with another value, below command will replace the values "fetchReport" and "viewReport" as "Report" in "serviceType' field. Example: | replace fetchReport with Report, viewReport with Report in serviceType TABLE: This command helps to format the results into tabular output. Example: | table request, rc, pt TRANSACTION:  This command helps to merge events into a single event based upon a common identifier, below command will create events based on two events i.e. it will fetch the txn-id w...

TOP: Will show you top results with respect to your field. Example: index=_internal | top limit=5 component RARE: Will help you to find out least common values of a field, i.e. it is similar to TOP but works in opposite direction. Example: index=_internal | rare limit=5 component FIELDS: Will help you to limit your columns, lets say you want to remove count from above table, fields can help you to achieve that. Though there are other usage of fields as well but you will learn slowly and gradually when you start building some complex queries. Example: index=_internal | top limit=5 component | fields component, percent TABLE: Same thing can be achieved via table as well. Example: index=_internal | top limit=5 component | table component, percent RENAME: Lets say you want to rename a column, for that you can use rename command. Example: index=_internal | top limit=5 component | rename percen...

Searching on Splunk is quite simple. Just login to your Splunk Enterprise installation, navigate to App: Search & Reporting . It will bring you to a new web page which is basically our search head. Type in your query and you are done. All your events which matched your query will be presented on your screen, If you will notice below, the query which I have used have nothing much its just searching all the events from "idx_messages" index < remember we added a monitor on one of our remote host to forward the data to idx_messages index   >. Based on above search it resulted in 1068 events in last 7 days. Field names are case sensitive. Field values are not case sensitive, if used without single quotes. i.e. below queries with give us same results: index=idx_messages date_wday=monday  index=idx_messages date_wday=MONDAY index=idx_messages date_wday="MONDAY" But if I use below query it might not give me...