Linux常用命令-expect

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命令

expect

描述

programmed dialogue with interactive programs, Version 5
交互式编程工具

用法

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expect [ -dDinN ] [ -c cmds ] [ [ -[f|b] ] cmdfile ] [ args ]

选项

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Command:
send      用于向进程发送字符串
expect    从进程接收字符串
spawn     启动新进程
interact  执行交互命令

注意

expect命令需要安装expect软件包
参考
https://www.linuxprobe.com/linux-expect-auto.html
https://blog.csdn.net/lijingjingchn/article/details/97129561
https://www.cnblogs.com/kevingrace/p/5900303.html
https://blog.csdn.net/u010820857/article/details/89925274

示例

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$ yum install expect

# 通过expect实现ssh远程登录
$ vim ssh.exp
#!/usr/bin/expect

set timeout 10
set host 192.168.80.12
set username root
set password "redhat"

spawn ssh $username@$host
expect {
    "yes/no" { send "yes\r";exp_continue }
    "password:" { send "$password\r" }
}
expect "]*" {send "echo a >> /tmp/a\r"}
#expect "]*" {send "exit\r"}
#expect eof
interact
$ chmod 755 ssh.exp
$ ./ssh.exp


# 登录sftp脚本
$ vim sftp.sh
#!/bin/bash

host=192.168.80.12
username=root
password="redhat"

/usr/bin/expect << EOF
    set timeout 5
    spawn sftp -o stricthostkeychecking=no -P 22 $username@$host
    expect {
        "yes/no" { send "yes\r";exp_continue }
        "password" { send "$password\n"}
    }
    expect "sftp>"
    send "ls\n"
    send "bye\r"
    expect eof
EOF
$ sh sftp.sh