03. Learn note-linux below root directory introduction

This section provides a detailed description of the root directory under Linux.

/bin: Executable file user command

/boot: System startup related files

/dev: Device files

Block devices: Random access

Character Devices: Linear access, per-character display and mouse are linear access

Device number: Main device number (major) and secondary device number (minor)

/etc: Most of the system administration and configuration files are plain text files

/etc/passwd user account information.

/etc/shadow Secure user account information.

/etc/group group account information.

/etc/gshadow Security group account information.

/etc/default/useradd The default value for account creation.

/etc/skel/ The directory that contains the default files.

/etc/login.defsshadow Cipher suite configuration.

/home directory, home directory default is/home/username can be represented by ~username

/lib: library file

/lib: Kernel module files

Static library . A

Dynamic library . dll.

/lost+found: This directory is usually empty, the system is not normal shutdown and left "homeless" file is here

/media: mount point directory is generally a directory of mobile devices

/MNT: Mount point directory Additional temporary file system

/OPT: Optional Directory The installation directory of third-party programs

/proc: Virtual directory, is the system memory mapping can directly access this directory to obtain system information

/sbin: Executable file, administrative command to store the hypervisor used by the system administrator

/var overflow area for some large files, such as log files for various services

/usr The largest directory, applications and files to be used in almost all of this directory, which contains:

/USR/X11R6 the directory where x window is stored

/usr/bin a multitude of applications

/usr/sbin Some management programs for super users

/usr/doc Linux Documentation

/usr/include the header files needed to develop and compile applications under Linux

/usr/lib Common dynamic-link libraries and package profiles

/usr/man Help Documentation

/USR/SRC source code, the Linux kernel source is placed in the/usr/src/linux

/usr/local/bin Local Add-on command

/usr/local/lib locally added Coogan file system

03. Learn note-linux below root directory introduction