shell 批量添加用户，ssh免密批量

准备要添加的用户文件users.txt

user1
user2
user3

批量add用户并设置密码

#!/bin/bash
 
file="users.txt"

while IFS= read -r username
do
  useradd "$username"
  echo "$username:$username" | chpasswd
done < "$file"

批量给用户添加密钥

#!/bin/bash
 
file="users.txt"

while IFS= read -r username
do
  su - $username -c "ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa"
done < "$file"

批量执行ssh-copy-id

#!/bin/bash
 
file="users.txt"

while IFS= read -r username
do
  su - $username <<EOF
ssh-copy-id hostname
exit
EOF
done < "$file"