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 （然后一路回车）
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:
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
使用mkpasswd产生随机密码
[root@manage .ssh]# mkpasswd -l 32
megVjmbpo8tw2zn$nmcgguensluxayCw
ip_list.txt为远程服务器IP列表
[root@manage .ssh]# cat ip_list.txt
192.168.9.201
192.168.9.202
如果远程服务器修改了默认ssh的端口号，就使用ssh -p 17173，17173为端口号
#!/bin/bash
#============== Though ssh remote server ,auto modify ROOT passwd =============#
for IP in `cat /bak/scripts/ip_list.txt` #导入远程要修改主机的IP
do
#========================= 创建远程主机密码 ===================================#
echo "megVjmbpo8tw2zn$nmcgguensluxayCw" > R_PWD.txt # 可以写成自己需要的密码
R_PWD=`cat R_PWD.txt` # 引用变量
#========================= 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" >> /var/log/R_Server.log
else
echo -e "$(date "+%Y-%m-%d %H:%M:%S")\t${IP} R_PWD.txt is create fail\tplease check!\t" >> /var/log/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" >> /var/log/M_pass.log
fi
done
最后执行shell脚本
