Linux批量设置免密登录shell脚本

本文主要是介绍Linux批量设置免密登录shell脚本，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

一：话不多说，直接上脚本

#!/bin/bash# 用户名和密码配置
USERNAME="root"
PASSWORD="123456"
NEW_ROOT_PASSWORD='root@123'# 转义新的 root 密码以安全地传递给远程 shell
ESCAPED_PASSWORD=$(printf '%q' "$NEW_ROOT_PASSWORD")# 主机列表
HOSTS=(192.168.60.36,192.168.60.37,192.168.60.38,
)# SSH 免密登录设置
for HOST in "${HOSTS[@]}"; doecho "Setting up key-based SSH for ${HOST}..."sshpass -p "${PASSWORD}" ssh-copy-id -o StrictHostKeyChecking=no "${USERNAME}@${HOST}"
done# 允许 root 登录并设置 root 密码for HOST in "${HOSTS[@]}"; doecho "Configuring ${HOST} to allow root login and setting new root password..."ssh -t "${USERNAME}@${HOST}" "echo '${PASSWORD}' | sudo -S sh -c 'sed -i \"s/^#PermitRootLogin prohibit-password/PermitRootLogin yes/\" /etc/ssh/sshd_config; echo root:${ESCAPED_PASSWORD} | chpasswd; service sshd restart'"# 获取 IP 地址的最后一位LAST_OCTET=$(echo "$HOST" | grep -oP '\.\K\d+$')# 设置主机名为 node-<last_octet>NEW_HOSTNAME="node-$LAST_OCTET"echo "————————————设置root免密——————"sshpass -p "$NEW_ROOT_PASSWORD" ssh-copy-id -o StrictHostKeyChecking=no -i ~/.ssh/id_rsa.pub "root@$HOST"echo "——————————设置主机hostname——————————"ssh -t "root@$HOST" "echo '${NEW_ROOT_PASSWORD}' | sudo -S hostnamectl set-hostname $NEW_HOSTNAME"done