linux expect 实例

古城微笑少年丶 2021-06-24 14:00 353阅读 0赞

1,ssh实现自动登录,并停在登录服务器上

#!/usr/bin/expect -f  
     set ip [lindex $argv 0 ]     //接收第一个参数,并设置IP  
     set password [lindex $argv 1 ]   //接收第二个参数,并设置密码  
     set timeout 10                   //设置超时时间  
     spawn ssh root@$ip       //发送ssh请滶  
     expect {                 //返回信息匹配  
     "*yes/no" { send "yes\r"; exp_continue}  //第一次ssh连接会提示yes/no,继续  
     "*password:" { send "$password\r" }      //出现密码提示,发送密码  
     }  
     interact          //交互模式,用户会停留在远程服务器上面.

运行结果如下:

root@ubuntu:/home/zhangy# ./test.exp 192.168.1.130 admin  
    spawn ssh root@192.168.1.130  
    Last login: Fri Sep  7 10:47:43 2012 from 192.168.1.142  
    [root@linux ~]#

这个例子有统一的接口,根据IP和密码可以连接到不同的机器.如果你嫌输入IP和密码麻烦,看下面的例子

#!/usr/bin/expect -f  
     set ip 192.168.1.130  
     set password admin  
     set timeout 10  
     spawn ssh root@$ip  
     expect {  
     "*yes/no" { send "yes\r"; exp_continue}  
     "*password:" { send "$password\r" }  
     }  
     interact

结果：

root@ubuntu:/home/zhangy# ./web.exp  
    spawn ssh root@192.168.1.130  
    Last login: Fri Sep  7 12:59:02 2012 from 192.168.1.142  
    [root@linux ~]#

2,ssh远程登录到服务器,并且执行命令,执行完后并退出

结果：

root@ubuntu:/home/zhangy# ./test3.exp  
    spawn ssh root@192.168.1.130  
    root@192.168.1.130's password:  
    Last login: Fri Sep  7 14:05:07 2012 from 116.246.27.90  
    [root@localhost ~]# pwd  
    /root  
    [root@localhost ~]# exit  
    logout  
    Connection to 192.168.1.130 closed.

3,远程登录到ftp,并且下载文件

#!/usr/bin/expect -f  
     set ip [lindex $argv 0 ]  
     set dir [lindex $argv 1 ]  
     set file [lindex $argv 2 ]  
     set timeout 10  
     spawn ftp $ip  
     expect "Name*"  
     send "zwh\r"  
     expect "Password:*"  
     send "zwh\r"  
     expect "ftp>*"  
     send "lcd $dir\r"  
     expect {  
     "*file"  { send_user "local $_dir No such file or directory";send "quit\r" }  
     "*now*"  { send "get $dir/$file $dir/$file\r"}  
     }  
     expect {  
     "*Failed" { send_user "remote $file No such file";send "quit\r" }  
     "*OK"     { send_user "$file has been download\r";send "quit\r"}  
     }  
     expect eof

结果

root@ubuntu:/home/zhangy# ./test2.exp 192.168.1.130 /var/www/www aaa.html  
    spawn ftp 192.168.1.130  
    Connected to 192.168.1.130.  
    220 (vsFTPd 2.0.5)  
    Name (192.168.1.130:root): zwh  
    331 Please specify the password.  
    Password:  
    230 Login successful.  
    Remote system type is UNIX.  
    Using binary mode to transfer files.  
    ftp> lcd /var/www/www  
    Local directory now /var/www/www  
    ftp> get /var/www/www/aaa.html /var/www/www/aaa.html  
    local: /var/www/www/aaa.html remote: /var/www/www/aaa.html  
    200 PORT command successful. Consider using PASV.  
    150 Opening BINARY mode data connection for /var/www/www/aaa.html (66 bytes).  
    226 File send OK.  
    66 bytes received in 0.00 secs (515.6 kB/s)  
    quit aaa.html has been download  
    221 Goodbye.