SSH批量分发实现

1、非交互式创建秘钥对

ssh-keygen -f ~/.ssh/id_rsa -P '' -q

ssh-keygen秘钥对参数：

[-P old_passphrase]：接密码
[-f output_keyfile]：输出的秘钥文件
[-q]：不输出信息
[-t dsa]：制定秘钥类型

2、分发秘钥文件

ssh-copy-id -f -i ~/.ssh/id_rsa.pub "-o StrictHostKeyChecking=no" 172.16.1.7
（不输入回车，分发秘钥文件）

3、sshpass工具分发秘钥文件

sshpass -p123456 ssh-copy-id -f -i ~/.ssh/id_rsa.pub "-o StrictHostKeyChecking=no" 172.16.1.7

yum install sshpass -y

[root@aaa ~]# sshpass -help
Usage: sshpass [-f|-d|-p|-e] [-hV] command parameters
   -f filename   Take password to use from file
   -d number     Use number as file descriptor for getting password
   -p password   Provide password as argument (security unwise)  #指定用户密码操作
   -e            Password is passed as env-var "SSHPASS"
   With no parameters - password will be taken from stdin

   -P prompt     Which string should sshpass search for to detect a password prompt
   -v            Be verbose about what you're doing
   -h            Show help (this screen)
   -V            Print version information
At most one of -f, -d, -p or -e should be used

4、利用脚本实现：

[root@aaa .ssh]# cat /server/script/ssh-copy.sh 
#!/bin/bash
#yum install sshpass -y
ssh-keygen -f ~/.ssh/id_rsa -P '' -q #非交互式创建秘钥对(公钥)
for ip in 3
do
    sshpass -p123456 ssh-copy-id -f -i ~/.ssh/id_rsa.pub "-o StrictHostKeyChecking=no" 123.57.220.$ip
done