awk: add example with negative pattern

1 files changed, 6 insertions, 0 deletions

diff --git a/src/tools/awk.md b/src/tools/awk.md
index 7ffe9a8..5fc3184 100644
--- a/src/tools/awk.md
+++ b/src/tools/awk.md
@@ -102,6 +102,12 @@ awk 'NR%2 == 0 { print $0 }' <file>
 The pattern `NR%2 == 0` matches every second record and the action `{ print $0 }`
 prints the whole record.
 
+### Negative patterns
+```bash
+awk '!/^#/ { print $1 }' <file>
+```
+Matches records not starting with `#`.
+
 ### Access last fields in records
 ```bash
 echo 'a b c d e f' | awk '{ print $NF $(NF-1) }'