linux文件层次的帮助在哪里查

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linux / 目录树各子目录到底是什么含义，可以通过

 

man hier 来查询，下面是例子：

 

HIER(7)                                                            Linux Programmer's Manual                                                            HIER(7)

NAME
       hier - description of the file system hierarchy

DESCRIPTION
       A typical Linux system has, among others, the following directories:

       /      This is the root directory.  This is where the whole tree starts.

       /bin   This directory contains executable programs which are needed in single user mode and to bring the system up or repair it.

       /boot  Contains  static files for the boot loader.  This directory holds only the files which are needed during the boot process.  The map installer and
              configuration files should go to /sbin and /etc.

       /dev   Special or device files, which refer to physical devices.  See mknod(1).

       /etc   Contains configuration files which are local to the machine.  Some larger software packages, like X11, can have their  own  subdirectories  below
              /etc.   Site-wide  configuration  files may be placed here or in /usr/etc.  Nevertheless, programs should always look for these files in /etc and
              you may have links for these files to /usr/etc.

       /etc/opt
              Host-specific configuration files for add-on applications installed in /opt.

       /etc/sgml
              This directory contains the configuration files for SGML and XML (optional).

       /etc/skel
              When a new user account is created, files from this directory are usually copied into the user's home directory.

       /etc/X11
              Configuration files for the X11 window system (optional).

       /home  On machines with home directories for users, these are usually beneath this directory, directly or not.  The structure of this directory  depends
              on local administration decisions.

       /lib   This directory should hold those shared libraries that are necessary to boot the system and to run the commands in the root file system.

       /media This directory contains mount points for removable media such as CD and DVD disks or USB sticks.

       /mnt   This  directory  is a mount point for a temporarily mounted file system.  In some distributions, /mnt contains subdirectories intended to be used
              as mount points for several temporary file systems.

       /opt   This directory should contain add-on packages that contain static files.