![]() The above event is from Splunk tutorial data. Thu 00:15:06 mailsv1 sshd: Failed password for invalid user desktop from 194.8.74.23 port 2285 ssh2 Let’s see a working example to understand the syntax. It matches a regular expression pattern in each event, and saves the value in a field that you specify. The command takes search results as input (i.e the command is written after a pipe in SPL). Rex is a SPL (Search Processing Language) command that extracts fields from the raw data based on the pattern you specify using regular expressions. Eventually, you will start to leverage the power of rex command and regular expressions, which is what we are going to look in detail now. However as you gain more experience with field extractions, you will start to realize that the Field extractor does not always come up with the most efficient regular expressions. Using the Fields menu in Settings in Splunk Webįor Splunk neophytes, using the Field Extractor utility is a great start. ![]()
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