awk — Multi-File Processing

Two-file awk patterns for joins, diffs, and per-file record tracking.

Page	Description
FNR vs NR	File boundaries, per-file processing, NR==FNR idiom
Joins	Inner/left join, lookups, enrichment
Diffs	Set operations, file comparison, symmetric diff

Page

Description

File boundaries, per-file processing, NR==FNR idiom

Inner/left join, lookups, enrichment

Set operations, file comparison, symmetric diff