当您尝试使用passwd命令修改Linux系统的ECS实例密码时，出现passwd: Module is unknown和passwd: password unchanged的错误提示，这通常意味着系统中与密码管理相关的PAM（Pluggable Authentication Modules）配置出现了问题，或者某些必要的PAM模块缺失或配置不正确。PAM是Linux系统中用于管理用户认证的模块。

文章 2024-11-18 来自：开发者社区

在 Linux 系统中，“cd”命令用于切换当前工作目录

一、引言在 Linux 系统中，命令行操作是非常重要的一部分。而“cd”命令作为最基本的命令之一，用于切换当前工作目录。虽然“cd”命令看似简单，但在实际使用中，却有许多小技巧和注意事项。本文将详细介绍“cd”命令在使用时的一些小技巧，帮助读者更好地掌握这一命令，提高工作效率。二、cd 命令的基本用法和常见技...

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