Extract up hosts in /24 networks to csv for OpenVas using nmap -sp (so nmap needed)

chekcUpIps.sh

#!/bin/bash
#script extract the IPs of a network that answer to a ping request
#create a csv for others automated vuln scanners
#use fo this: ./checkUpIps.sh 192.168.1.0 (only networks /24 ended with 0 without writing /24)
ip=$1
ipname=$(echo $1 | tr . -)

nameResult='ips'$ipname'.txt'
namecsv='onlyIps'$ipname'.csv'

nmap -sP $1/24 > $nameResult

cat $nameResult | grep -P 'Nmap scan report for' | sed -e 's/Nmap scan report for \(.*\)/\1/' | sed 's/$/,/' > $namecsv