目录前javascript言一、升级前的核心准备1. 数据备份与验证2. 系统状态检查二、软件包升级：分发行版实践1. Debian/Ubuntu系（APT）2. Red Hat系（YUM/DNF）3. Arch linux（Pacman）三、内核升级：安全与性能的平衡1
Functions and methods in PHP are case-insensit开发者_开发百科ive as illustrated in the following example.
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