shell脚本中expect 使用awk问题

registcn

#!/bin/bash

myexp="/home/work/usr/bin/expect"
myssh="ssh -o StrictHostKeyChecking=no -o ConnectionAttempts=2  -o ConnectTimeout=2 -nq -lroot"

$myexp<<eof22
spawn $myssh yourdomain "cd /etc/ && awk '\$1~/127.0.0.1/ {print \$1,\$2,$mac}' hosts >hosts.bak && cp hosts.bak hosts
             hostname $mac"
expect {
        "(yes/no)?" {send "yes\r";exp_continue;}
        ".*assword:" {send "yourrootpassword\r";exp_continue;}
        "Permission denied" {exit 1}
        "No such file or directory" {exit 2}
        "Name or service not known" {exit 3}
}
eof22

注释：
yourdoamin和yourpassword请根据自己情况填写
问题貌似出在awk那里（可能特殊符号处理不对？如果去掉awk，脚本的整体框架没问题），怎么处理特殊符号呢？
下面是报错：
can't read "1": no such variable
    while executing
"spawn ssh -o StrictHostKeyChecking=no -o ConnectionAttempts=2  -o ConnectTimeout=2 -nq -lroot yourdomain "cd /etc/ && awk \'$1~/127.0.0.1/ {pr..."

waker

""变成{}
\$变成$

xiaochuanjiejie

waker 发表于 2013-11-27 08:41
""变成{}
\$变成$

受教了！