firewall-cmd IP白名单 允许指定IP访问全部端口

nginx 报错/usr/local/var/run/nginx/client_body_temp/0000000001

centos 修改配置立即生效

SWAP虚拟内存使用率过高、过低

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centos防火墙firewall只允许特定ip访问指定端口

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Error: Failed to download metadata for repo 'appstream': Cannot prepare internal mirrorlist: No URLs in mirrorlist