How to use regular expressions in awk?

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#1

How to use regular expressions in awk?

#2

Hey Richard

To use regular expressions in awk, utilize the ~ operator:

  1. awk '/pattern/ {print $0}' file - prints lines that match the pattern.
  2. awk '!/pattern/ {print $0}' file - prints lines that don’t match the pattern.
  3. awk '$1 ~ /pattern/ {print $2}' file - prints the second field where the first field matches the pattern.

Replace pattern with your desired regex.