linux服务器配置免密小脚本

首先创建服务器配置文件，文件名：sship.txt
写入要配置免密的机器ip，

172.44.0.xx
172.44.0.xx
172.44.0.xx

注：一行一ip，密码必须统一一致

创建脚本文件，文件名：sshsetup.exp
写入内容：

#!/bin/bash
##!/usr/bin/expect

## use by root
## 给一个用户创建互信 
## expect sshsetup.exp $user $password $home $ip_list_file 
## expect sshsetup.exp gprds gp123 /data7/gprds ip.txt 
##                     0     1     2            3
set user [lindex $argv 0]
set password [lindex $argv 1]
set home [lindex $argv 2]
set host [lindex $argv 3]
set currdir [exec pwd]

exec rm -rf $currdir/ssh_out && rm -rf $currdir/authorized_keys

set fil [open $host r]
while {[gets $fil ip ]>=0} {

    spawn ssh $user@$ip "rm -rf $home/.ssh/ && ssh-keygen -t rsa"
    expect {
        "*yes/no" {
            send "yes\r"
            exp_continue
        }
        "*assword" {
            send "$password\r"
            exp_continue
        }
        "*file in which to save the key*" {
            send "\n\r"
            send_user "$home/.ssh\r"
            exp_continue
        }
        "*Enter passphrase*" {
            send "\n\r"
            exp_continue
        }
        "*Enter same passphrase again*" {
            send "\n\r"
            exp_continue
        }
    }
    
    exec rm -rf $currdir/ssh_out
    spawn scp -r $user@$ip:$home/.ssh/id_rsa.pub ssh_out
    expect {
        "*yes/no" {
            send "yes\r"
            exp_continue
        }
        "*assword" {
            send "$password\r"
            exp_continue
        }
    }

    exec cat $currdir/ssh_out >> $currdir/authorized_keys
}
close $fil

exec rm -rf $currdir/ssh_out

set file [open $host r]
while {[gets $file ip ]>=0} {
    spawn scp -r $currdir/authorized_keys $user@$ip:$home/.ssh/
    expect {
        "*yes/no" {
            send "yes\r"
            exp_continue
        }
        "*assword" {
            send "$password\r"
            exp_continue
        }
    }
    
    spawn ssh $user@$ip "chmod 0600 $home/.ssh/authorized_keys "
    expect {
        "*yes/no" {
            send "yes\r"
            exp_continue
        }
        "*assword" {
            send "$password\r"
            exp_continue
        }
    }
}
close $file

启动脚本：

expect sshsetup.exp 免密用户 机器密码 免密用户文件位置如：/root sship.txt