批量修改远程linux服务器密码

 #!/bin/bash

# BY kerryhu
# MAIL:[email protected]
# 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