Check if all fields are the same

same.awk

# Check if all fields are the same.

NF > 1 {
	i=2 # nth field to starts with

	for (i; i<=NF; i++) {
		for (j=i+1; j<=NF; j++) {
			if ($i != $j) {
				print $0
				break
			}
		}
	}
}