【Nginx + Keepalived 实现高可用的负载均衡架构】-4. 安装 Keepalived

在两台服务器上安装 Keepalived：

# Ubuntu/Debian
sudo apt install keepalived

# CentOS/RHEL
sudo yum install keepalived

启动并启用 Keepalived：

sudo systemctl start keepalived
sudo systemctl enable keepalived

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