From e388d3bfb52083914c4de0f25e4cfcb3c6482d46 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mariusz=20B=C5=82aszczak?= <mariusz.blaszczak@gmail.com>
Date: Fri, 15 Mar 2019 11:03:07 +0100
Subject: [PATCH] awk: how to display only first column of text with

It might be useful e.g. when removing docker containers:
docker ps -a | grep openeir | awk '{print $1 }' | xargs docker rm
---
 sheets/awk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sheets/awk b/sheets/awk
index 0217d60..67f6a07 100644
--- a/sheets/awk
+++ b/sheets/awk
@@ -12,3 +12,6 @@ printf '1 2 3' | awk 'BEGIN {OFS=":"}; {print $1,$2,$3}'
 
 # search for a paragraph containing string
 awk -v RS='' '/42B/' file
+
+# display only first column from multi-column text
+echo "first-column  second-column  third-column" | awk '{print $1}'