| 一、建立信任关系 
 192.168.9.203 为管理机
 
 192.168.9.201 192.168.9.202 为远程linux服务器
 
 1、在管理机生成证书、
  Generating public/private rsa key pair. 复制代码[root@manage ~]# ssh-keygen -t rsa
 
 Enter file in which to save the key (/root/.ssh/id_rsa):
 
 Enter passphrase (empty for no passphrase):
 
 Enter same passphrase again:
 
 Your identification has been saved in /root/.ssh/id_rsa.   (私钥)
 
 Your public key has been saved in /root/.ssh/id_rsa.pub. (公钥)
 
 The key fingerprint is:
 
 36:ec:fc:db:b0:7f:81:7e:d0:1d:36:5e:29:dd:5b:a0
 
 
 
 2、将管理机上的公钥传送到各远程服务器
 
 如远程服务器更改了默认的ssh端口号,就使用scp -P 17173,17173为端口号
  管理机与远程主机信任关系建立完毕 复制代码[root@manage .ssh]# scp id_rsa.pub 192.168.9.201:/root/.ssh/authorized_keys [root@manage .ssh]# scp id_rsa.pub 192.168.9.202:/root/.ssh/authorized_keys
 
 
 
 二、通过shell脚本批量修改远程服务器密码
 
 如果要调用mkpasswd就得安装expect,使用mkpasswd可以随机产生密码
 
 usage: mkpasswd [args] [user]
 
 where arguments are:
 
 -l #      (length of password, default = 10)
 
 -d #      (min # of digits, default = 2)
 
 -c #      (min # of lowercase chars, default = 2)
 
 -C #      (min # of uppercase chars, default = 2)
 
 -s #      (min # of special chars, default = 1)
 
 -v        (verbose, show passwd interaction)
 
 -p prog   (program to set password, default = passwd)
 
 比如说你要指定一个长度为8,而且至少有三个大写字母的密码,那么可以这样输入:
 
 mkpasswd -l 8 - C 3,好了,密码就会按你的要求随机产生了  ip_list.txt为远程服务器IP列表
  192.168.9.201 复制代码[root@manage .ssh]# cat ip_list.txt
 
 192.168.9.202
 
 如果远程服务器修改了默认ssh的端口号,就使用ssh -p 17173,17173为端口号
   复制代码#!/bin/bash #============== Though ssh remote server ,auto modify ROOT passwd =============#  for IP in `cat /root/ip_list.txt` #导入远程要修改主机的IP  do  #========================= 创建远程主机密码 ==========================# TMP_PWD=`mkpasswd -l 8 -C 3` R_PWD=`echo ${IP}_${TMP_PWD}` echo "${IP}_${TMP_PWD}" > R_PWD.txt   #=========================== 修改远程主机密码 ========================#  if [ $? = 0 ] ; then    ssh $IP passwd root --stdin < R_PWD.txt    echo -e "$(date "+%Y-%m-%d %H:%M:%S")\t${IP}\t${R_PWD}\t" >> R_Server.log else    echo -e "$(date "+%Y-%m-%d %H:%M:%S")\t${IP} R_PWD.txt is create fail\tplease check!\t" >> M_pass.log fi if [ $? = 0 ] ; then    echo -e "$(date "+%Y-%m-%d %H:%M:%S")\tThe ${IP} passwd is modify OK\t" >> M_pass.log else    echo -e "$(date "+%Y-%m-%d %H:%M:%S")\tThe ${IP} passwd is modify fail\tplease check!\t" >> M_pass.log fi done
 | 
 
 转自:http://bbs.chinaunix.net/thread-3619218-3-1.html
  
转载于:https://blog.51cto.com/wwdhks/878556