awk
SafeField processing
awk '{print $1}' <file>
Splits lines into fields to extract/aggregate; great for logs.
Examples
awk '{print $1}' access.log | sort | uniq -cCount requests by IP
Syntax
awk '<pattern>{<action>}' <file>
Before you run it
Read-only output.
The same reference, with no signal at all
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