环境：centos7
思路：ssh与要修改密码免密。脚本读取文本中ip地址，然后远程修改密码，并将密码放入文本中。
1、准备ip地址文本
[root@186 ~]# cat ip 100.98.100.186 100.98.100.188
2、编写批量修改密码脚本
[root@186 ~]# more change-passwd.sh
#!/bin/bash
source /etc/profile
#人机交互是否执行批量修改密码
while true;do
stty -icanon min 0 time 100
echo -n "Automatic execute ten seconds after,Are you sure you want to start the task(yes or no)?"
read Arg
case $Arg in
Y|y|YES|yes)
break;;
N|n|NO|no)
exit;;
"") #Autocontinue
break;;
esac
done
#读取ip地址使用随机数作为密码修改root密码输入到文件ma.txt中
for ip in `cat ip`
do
p=`< /dev/urandom tr -dc 0-9-A-Z-a-z-/|head -c ${1:-10};echo`
echo $p
echo $ip
ssh $ip "echo $p|passwd --stdin root"
if [ $? = ‘0‘ ]
then
echo $ip密码$p >> ma.txt
else
echo ‘faild‘
fi
done
3、赋权并执行
[root@186 ~]# chmod u+x change-passwd.sh [root@186 ~]# ./change-passwd.sh Automatic execute ten seconds after,Are you sure you want to start the task(yes or no)?yes zYUkJJNxEr 100.98.100.186 Changing password for user root. passwd: all authentication tokens updated successfully. 42trLHphkA 100.98.100.188 Changing password for user root. passwd: all authentication tokens updated successfully. [root@186 ~]# cat ma.txt 100.98.100.186密码zYUkJJNxEr 100.98.100.188密码42trLHphkA
原文：https://www.cnblogs.com/wukc/p/13938555.html