Linux system, directory structure

/	root directory, the general root directory only, do not store files, / etc , /bin , / Dev , /lib , /sbin should be placed in a partition with the root directory
/bin	Binary This directory holds the most frequently used commands .
/boot	Store the Linux some core files at startup, including some connection files and image files
/dev	Device the abbreviation, which holds the Linux of external devices, in Linux The way the device is accessed and the way the file is accessed is the same
/etc	Stores all the configuration files and subdirectories required for system administration
/home	User home directory. In Linux , each user has a directory of their own, which is typically named after the user's account name
/lib	Store the most basic dynamic Connection Sharing Library of the system, acting like Windows of the DLL file. These shared libraries are required for almost all applications
/lost+found	Normally empty, when the system is shut down illegally, some files are stored here
/media	Linux some devices are automatically recognized by the system. For example U disc, optical drive, etc., when recognized, Linux will mount the identified device to this directory.
/mnt	A directory that lets users temporarily mount other file systems. we can mount the optical drive in /mnt/ and then enter the directory to see what's in the CD-ROM .
/opt	A directory for the host to install additional software. For example, you can install a Oracle database in this directory. Default is empty
/proc	The virtual directory, which is a mapping of system memory, can be accessed directly by accessing the directory for System information. The contents of this directory in memory, you can directly modify some of the files inside. For example, you can use the following command to block the host Ping commands to make others unable to Ping Your machine: echo 1 >/proc/sys/net/ipv4/icmp_echo_ignore_all
/root	User home directory for system administrator
/sbin	s is a Super User The system administrator uses the hypervisor
/selinux	this is Redhat/centos The unique directory, SELinux is a security mechanism, similar to Windows 's firewall. But the mechanism is more complex, and this directory is the storage SELinux of the relevant files
/srv	This directory is the data that needs to be extracted after some services are started
/sys	/sys this is Linux 2.6 a big change in the kernel. the directory is installed under the 2.6 A newly emerged filesystem in the kernel Sysfs . The sysfs file system integrates the following 3 file system Information: for a process proc file System, Device-specific Devfs File System and for pseudo-terminal devpts file System. The file system is a visual reflection of the kernel device tree. When a kernel object is created, the corresponding files and directories are also created in the kernel object subsystem.
/tmp	Temp file directory
/usr	This directory is very important. Many of the users ' applications and files are placed in this directory, similar to Windows under the Program Files Catalogue
/usr/bin	Applications used by system users
/usr/sbin	More advanced hypervisor and system daemons used by super users
/usr/src	Default drop location for kernel source code
/var	This directory is stocked with things that are constantly expanding, and we are accustomed to placing directories that are often modified in this directory. Include log files

Linux system, directory structure