ssh 远程echo追加文本(单双引号的使用,awk引用外部变量,$的使用)

#!/bin/bash
export x=1
export y=2
export z=3
for i in {1..6}
do
a=`awk -v i=$i -v x=$x 'NR==i {print $x}' /root/ip.txt`; //awk 引用外部变量 -v
b=`awk -v i=$i -v y=$y 'NR==i {print $y}' /root/ip.txt`;
c=`awk -v i=$i -v z=$z 'NR==i {print $z}' /root/ip.txt`;
ssh $a sed -i '/IPADDR/d' /etc/sysconfig/network-scripts/ifcfg-eth0;
ssh $a sed -i '/PREFIX/d' /etc/sysconfig/network-scripts/ifcfg-eth0;
ssh $a sed -i '/GATEWAY/d' /etc/sysconfig/network-scripts/ifcfg-eth0;
#ssh $a sed -i '/IPADDR/d' /etc/sysconfig/network-scripts/ifcfg-eth1;
#ssh $a sed -i '/PREFIX/d' /etc/sysconfig/network-scripts/ifcfg-eth1;
#ssh $a sed -i '/GATEWAY/d' /etc/sysconfig/network-scripts/ifcfg-eth1;
ssh $a sed -i 's/dhcp/none/1' /etc/sysconfig/network-scripts/ifcfg-eth0;
ssh $a "echo -e 'IPADDR=