Difference between revisions of "Splunk"
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Group by hour of day | Group by hour of day | ||
− | <pre> | eval eventHour=strftime(_time,"%H") | stats count by eventHour | + | <pre> | eval eventHour=strftime(_time,"%H") | stats count by eventHour </pre> |
Export RAW logs | Export RAW logs |
Revision as of 14:25, 31 December 2021
Contents
Training
https://www.splunk.com/en_us/training/free-courses/splunk-fundamentals-1.html
Search
Match Value (.*) after "want:" and turn it into a field (field_name)
| rex field=_raw "some text before what we want:(?<field_name>.*)"
Match field is NULL
NOT field=*
Group results into 1 hour chunks
| timechart span=1h count(field_name) by field_name
Group by hour of day
| eval eventHour=strftime(_time,"%H") | stats count by eventHour
Export RAW logs
host=<host_name> | table _raw | outputcsv rawdump.csv
Then download as csv
Transforming Commands
| top [field field2] limit=0 showperc=False countfield="Renamed something" | Rate [field field2] limit=0
useother=True -- use when limit!=0 so 'extras' go into a catchall bucket
Stats - all stats functions must be done together (in the same pipes)
- Count
- Dc (Distinct Count)
- Sum -- stats sum(price) as "Gross Sales" by product_name
- Avg, Min, Max
- List -- stats list(Asset) as "stuff" by Employee
- Value - similar to list but unique.
IP lookup
| lookup dnslookup clientip as source_ip_field OUTPUT clienthost as output_field
Comments
Uses backticks
`comment("why did I add this random string to the search again?")`
Notify about Disabled Alerts
|REST /services/saved/searches | fields title disabled | where title like "IcareaboutX%" AND disabled=1
SNMP Link down
SNMP_TRAP_LINK* NOT"\.0" process=mib2d | table _raw