#!/bin/sh
awk '{ line[NR]=$0 "" }
END {
	for (i=0; i<=NR; i++)
	{
		split(line[i], record)
		if (record[1]=="auth" && match (record[3], "pam_unix"))
		{
			print "auth	sufficient	pam_skey.so.1"
			print line[i] " use_first_pass"
		}
		else
			print line[i]
	}
}'