#!/bin/bash

# BY kerryhu
# MAIL:king_819@163.com
# BLOG:http://kerry.blog.51cto.com
# Please manual operation yum of before Operation.....

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、
[root@manage ~]# ssh-keygen -t rsa
Generating public/private rsa key pair.
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
[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
 
管理机与远程主机信任关系建立完毕
 
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
 
yum -y install expect
 
ip_list.txt为远程服务器IP列表
[root@manage .ssh]# cat ip_list.txt
192.168.9.201
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
 
#!/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
 

本文出自 “聆听未来” 博客,请务必保留此出处http://kerry.blog.51cto.com/172631/430745