Shell IP Scanning

# Shell scriptecho Ping scan echo start scanning... ECHO to get the IP address of the local machine... myip = 'ifconfig eth0 | awk '{print $2}' | egrep "ADDR: [0-9]" | awk 'begin {FS = ": "} {print $2} ''echo" local IP: "$ myipnet_ip =$ {myip %. *}. echo "network scan start address:" $ net_ip '1' echo "Ping scan">. /up_host.txtfor scan_ip in $ (SEQ 255) doping-C 3 $ net_ip "$ scan_ip">/dev/null & Echo "the host is up ----" $ net_ip "$ scan_ip" & Echo $ net_ip "$ scan_ip" >. /up_host.txt | echo "the host is down --" $ net_ip "$ scan_ip" done