linux通过shell脚本实现telnet交互式自动化

首先需要有expect:

可以通过以下命令查看是否安装，如果未安装直接 yum install expect，如果不行请自行百度安装。

[root@localhost home]# whereis expect
expect: /usr/bin/expect /usr/share/man/man1/expect.1.gz

[root@localhost home]# expect
expect1.1> 

编写脚本如下：

#!/bin/bash
passwd="123456"
/usr/bin/expect <<-EOF
set timeout 50
spawn ssh  root@10.10.22.38
expect {
"*yes/*" { send "yes\r"; exp_continue }
"*password:" { send "$passwd\r" }
}
expect "*]*"
send "df -h\r"
EOF

解释一下：

/usr/bin/expect <<-EOF  #开始用expcet执行标志

EOF  #结束标志

expect {} #是expect要实现交互的命令集

[root@localhost home]# ssh root@10.10.22.38
root@10.10.22.38's password:

"*yes/*" 

"*password:" { send "$passwd\r" } #如上如果遇到返回值 *代表无限字符，后面是password:则执行 send发送字符串 \r回车

expect "*]*"    #等待出现]执行下一条命令
send "df -h\r"  #执行命令并回车。

#!/bin/bash
passwd="admin"
/usr/bin/expect <<-EOF
set timeout 50
spawn telnet 0
expect { 
"Login*"  { send "admin\r"}
}
expect {
"*assword:" { send "$passwd\r" }
} 
expect { 
"*admin>" {send "secur enable protocol-detect\r"}
}
expect { 
"*admin>" {send "secur set port-abnormal detect 2\r"}
}
expect { 
"*admin>" {send "secur show protocol-detect status\r"}
}
expect { 
"*admin>" {send "secur show port-abnormal-detect level\r"}
}
expect { 
"*admin>" {send "exit\r"}
}

EOF

 

python实现

#!/usr/bin/python

import telnetlib

host = ''10.32.17.10''

user = ''root''

password = ''123456''

commands = [''en'',password,''conf

t'',''int fa0/1'',''switchport mode multi'',''end'']

tn = telnetlib.Telnet(host)

tn.read_until("Username:")

tn.write(user + "n")

tn.read_until("Password:")

tn.write(password + "n")

for command in commands:

tn.write(command+''n'')

tn.write("exitn")

print tn.read_all()

print ''Finish!''