显示—ls

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切换工作目录—cd

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查看工作目录—pwd

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特殊路径符

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创建目录—mkdir

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创建文件—touch

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查看文件内容—cat

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复制—cp，移动—mv，删除—rm

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查找—which/find

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过滤—grep

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数量统计—wc

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管道符—“|”

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输出指定内容—echo

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反引号

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重定向符

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查看尾部内容—tail

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持续跟踪指再通过>>对文件追加内容时，会同时显示出来。

可以通过CTRL+C结束命令运行。

三种模式

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root用户

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用户组

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查看权限

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修改权限—chmod

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修改用户、用户组—chown

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快捷键

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安装软件—apt/yum

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