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Click to edit Master title styleClick to edit Master text stylesSecond levelThird levelFourth levelFifth levelPClick to edit Master title styleClick to edit Master text stylesSecond levelThird levelFo
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Click to edit Master title styleClick to edit Master text stylesSecond levelThird levelFourth levelFifth levelPClick to edit Master title styleClick to edit Master text stylesSecond levelThird levelFo
Click to edit Master title styleClick to edit Master text stylesSecond levelThird levelFourth levelFifth levelPClick to edit Master title styleClick to edit Master text stylesSecond levelThird levelFo
Click to edit Master title styleClick to edit Master text stylesSecond levelThird levelFourth levelFifth levelPClick to edit Master title styleClick to edit Master text stylesSecond levelThird levelFo
(2)用户组Linux下每个文件又属于一个用户组当创建一个文件或目录时系统会赋予它一个用户组关系chgrp命令可以改变文件的组关系(3)访问权限 Linux系统中的每个文件和目录都有访问权限用它来确定谁可以通过何种方式对文件和目录进行访问和操作 设定文件权限时在模式中常用以下的字母代表用户或用户组:u(user)表示文件的所有者g(group)表示文件的所属组o(others)表示其他用户a
Click to edit Master title styleClick to edit Master text stylesSecond levelThird levelFourth levelFifth levelPClick to edit Master title styleClick to edit Master text stylesSecond levelThird levelFo
Click to edit Master title styleClick to edit Master text stylesSecond levelThird levelFourth levelFifth levelPClick to edit Master title styleClick to edit Master text stylesSecond levelThird levelFo
超级用户的用户名为root它具有一切权限. (只有进行系统维护或其他必要情形下才用超级用户登录以避免系统出现安全问题) cat etcpasswdroot:x:0:0:root:root:binbashbin:x:1:1:bin:bin: 从passwd文件中可以看到第一行是root用户紧接的是系统用户普通用户通常在文件的尾部1.添加用户账号 超级用户root可以通过在系统提示符
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