[root@web03 scripts]# cat prevent_arp.sh #!/bin/bashlo_ip=$(ip a s lo|grep "10.0.0.1[3]/32"|wc -l)if [ $lo_ip -eq 0 ]then    ip addr add 10.0.0.13/32 dev lofiip_cnf=$(egrep "net.ipv4.conf" /etc/sysctl.conf|wc -l)if [ $ip_cnf -lt 4 ]then        cat >>/etc/sysctl.conf<<-EOF    net.ipv4.conf.all.arp_ignore = 1    net.ipv4.conf.all.arp_announce = 2    net.ipv4.conf.lo.arp_ignore = 1    net.ipv4.conf.lo.arp_announce = 2    EOF    sysctl -pfi