#!/bin/bash
s='header
1:test
2:test
3:none
4:test'
awk -F: 'FNR>1 && !/none/{print $1}' <<< "$s"
echo "---- Test 2 ----"
awk -F: 'FNR>1 && $2 !~ /none/{print $1}' <<< "$s"
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