Linux directory definition

/root directory, store system commands and user data, etc. (if the following mount points do not have separate partitions, they will be in the partition of the root directory)
/boot boot loader static link file for Linux boot-related programs
/home User directory, storing data for ordinary users
/tmp temp file
/usr Red Hat linux system where the software is stored, the maximum space should be allocated to it if possible
/usr/local the self-installed program is installed here
/var constantly changing data, some server services are placed below.
/OPT Additional Application Packages
/bin Basic Command Execution file
/dev Device files
/etc host-specific system configuration
/lib Basic shared libraries and kernel modules
/media mount point for moving media
/MNT for temporary mounting of file systems or other hardware devices (such as optical drives, floppy drives)
/proc virtual Directories of System Information (2.4 and 2.6 cores), which are in memory, generated by the system itself
/root Root User's Directory
/sbin Basic System Command execution file
/sys virtual directory for System Information (2.6 cores)
/SRV System-supplied data for service
/usr/x1186 x-windows directory, storing some x-windows configuration files
/usr/include System header file, storing some C-language header files
/USR/SRC Linux kernel source code, Linux system installed kernel source code are stored in this
/usr/bin some additions to the/bin catalogue
/usr/sbin some additions to the/sbin catalogue
/lost+found This directory is empty in most cases. But if you are working suddenly with a power outage, or you are not shutting down normally, some files will not be available when you restart the machine, and for these files, the system places them in this directory, as if providing a temporary shelter for homeless people.
/boot must always physically contain/etc,/bin,/sbin,/lib, and/dev, otherwise you will not be able to boot the system. A typical root partition requires 150–250MB size space.
/home Each user will place his private data into subdirectories of this directory. The size depends on how many users will use the system, and what files are placed in their directory. Depending on the purpose of the plan, 100MB space should be prepared for each user, but should be adjusted to your needs. If you plan to save a lot of multimedia files (Pictures, MP3, movies) in your home directory, you should prepare more space.
The temporary data created by the/TMP program is mostly stored in this directory. Usually 40–100 MB should be sufficient. Some applications-including archive handlers, D/dvd authoring tools, and multimedia software-may temporarily save image files using/tmp. If you want to use these programs, you should adjust the size of the/tmp directory accordingly. This is necessary for multi-user systems or Web servers. This allows the other parts of the file system to be secure even if the program is running with a large number of temporary files, or if the user is doing something wrong with the system. Because this part of the filesystem still has read and write operations, it usually has problems faster than the rest of the system.
/usr contains all user programs (/usr/bin), library files (/usr/lib), Documents (/usr/share/doc), and so on. This is the most space-consuming part of the file system. You need to provide at least 500MB of disk space. The total capacity will grow depending on the number and type of packages you want to install. A loose workstation or server installation should require 4–6GB.
/var all variable data, such as newsgroup articles, e-mails, web sites, databases, package system caches, etc., will be put into this directory. The size of this directory depends on the purpose of your computer, but for most people, it will be used primarily as a management tool for package systems. If you make a server, space should be as large as possible. My server's actual division and actual use of the size, has not actually put into use. So the/var directory doesn't use that much. The general Web hosting Web page directory is/var/www,postfix mail storage directory is:/var/mail,var/log, is the system logging partition,/var/spool: Store some mail, news, print queue and so on.
/OPT storage of optional installed software.

Linux directory definition