标签:linux expect
expect分发#! /usr/bin/expect
set host "192.168.133.132" //定义变量host
set passwd "123456"
spawn ssh root@$host //spawn后面跟系统shell命令,远程登录
expect {
"yes/no" { send "yes\r"; exp_continue} //初次登录机器会提示yes/no,再次登录不会是因为/root/.ssh/known_hosts有记录。表示有yes/no时,做括号中动作,exp_continue表示继续
"password:" { send "$passwd\r" }
}
interact //保持登录在机器上,若用expect eof,则停留一会儿退出
需要给文件执行权限
2.自动远程登录后,执行命令并退出
#!/usr/bin/expect
set user "root"
set passwd "123456"
spawn ssh $user@192.168.133.132
expect {
"yes/no" { send "yes\r"; exp_continue}
"password:" { send "$passwd\r" }
}
expect "]\*" //表示命令行前的部分,PS1的最后部分root用户是]#,普通用户是]$,因此需要通配
send "touch /tmp/12.txt\r"
expect "]\*"
send "echo 1212 > /tmp/12.txt\r"
expect "]\*"
send "exit\r" //退出
3.传递参数
#!/usr/bin/expect
set user [lindex $argv 0] //定义变量user值为参数1
set host [lindex $argv 1] //参数2
set passwd "123456"
set cm [lindex $argv 2] //参数3,发送的多条命令用分号隔开,命令执行时间不能太长,expect会有超时时间,默认10s。也可以自行设置:set timeout [number] 单位s,设定-1表示不限时间
spawn ssh $user@$host
expect {
"yes/no" { send "yes\r"}
"password:" { send "$passwd\r" }
}
expect "]\*"
send "$cm\r"
expect "]\*"
send "exit\r"
4.自动同步文件
#!/usr/bin/expect
set passwd "123456"
spawn rsync -av root@192.168.133.132:/tmp/12.txt /tmp/ //同步远端文件到本机
expect {
"yes/no" { send "yes\r"}
"password:" { send "$passwd\r" }
}
expect eof //不加这个会登录后立即退出导致根本没同步
5.指定host和要同步的文件
#!/usr/bin/expect
set passwd "123456"
set host [lindex $argv 0]
set file [lindex $argv 1]
spawn rsync -av $file root@$host:$file
expect {
"yes/no" { send "yes\r"}
"password:" { send "$passwd\r" }
}
expect eof
6.构建文件分发系统
需求背景:对于大公司而言,肯定时不时会有网站或者配置文件更新,而且使用的机器肯定也是好多台,少则几台,多则几十甚至上百台。所以,自动同步文件是至关重要的。
实现思路:首先要有一台模板机器,把要分发的文件准备好,然后只要使用expect脚本批量把需要同步的文件分发到目标机器即可。
核心命令:
rsync -av --files-from=list.txt??/??root@host:/
rsync.expect 内容
#!/usr/bin/expect
set passwd "123456"
set host [lindex $argv 0]
set file [lindex $argv 1]
spawn rsync -av --files-from=$file / root@$host:/ //list.txt里有文件的绝对路径列表
expect {
"yes/no" { send "yes\r"}
"password:" { send "$passwd\r" }
}
expect eof
ip.list内容
192.168.133.132
192.168.133.133
......
rsync.sh 内容
#!/bin/bash
for ip in `cat ip.list`
do
? ? echo $ip
? ? ./rsync.expect $ip list.txt
done
7.命令批量执行
exe.expect 内容
#!/usr/bin/expect
set host [lindex $argv 0]
set passwd "123456"
set cm [lindex $argv 1]
spawn ssh root@$host
expect {
"yes/no" { send "yes\r"}
"password:" { send "$passwd\r" }
}
expect "]\*"
send "$cm\r"
expect "]\*"
send "exit\r"
exe.sh 内容
#!/bin/bash
for ip in `cat ip.list`
do
? ? echo $ip
? ? ./exe.expect $ip "w;free -m;ls /tmp"
done
标签:linux expect
原文地址:http://blog.51cto.com/13582610/2117180