大家都知道expect是可以执行交互式命令的，例如：SSH等，当你有多台设备需要登录时，我们能不能使用类似java中的for循环来完成呢？下面我们来进行对比这两种方式：

1.

> cat forexpect.sh

#!/bin/sh

test()

{

expect -c "

log_user 0;

set timeout 10;

spawn echo $1;

interact;"

}

n=(192.168.0.1 192.168.0.0192.168.1.1)

length=${#n[*]}

echo "$length"

for((i=0;i<$length;i++))

do

echo "begin...."

echo $i

test ${n[$i]}

echo "end...."

done

运行结果： sh forexpect.sh

3
begin....
0
192.168.0.1
end....
begin....
1
192.168.0.0
end....
begin....
2
192.168.1.1
end....

2.

> begin.sh

#!/bin/bash

n=(192.168.1.0 192.168.1.1 192.168.1.2)

uname="Administrator"

pwd="66666666"

length=${#n[*]}

echo "$length"

for ((i=0;i<$length;i++))

do

echo "begin..."

echo $i

./open.sh ${n[$i]} $uname $pwd

echo "end..."

done

> cat open.sh

#!/usr/bin/expect -f
set ip [lindex $argv 0]
set uname [lindex $argv 1]
set pwd [lindex $argv 2]

spawn ssh -o "StrictHostKeyChecking no" $uname@$ip
expect "*password:"
send "$pwd\r"
#interact
expect eof