Linux root directory comments, file types and application components

Root file System (ROOTFS)

/boot: Boot file directory, kernel file (vmlinuz), boot loader (bootloader,grub)

/bin: Basic user binary commands that are available to all users and cannot be associated with separate partitions. The program that the OS starts to put into it

/sbin: The basic command for managing classes, and cannot be associated to separate partitions. The program that the OS starts to put into it

/lib: Basic shared library files, and kernel module files (lib/modules);

/LIB64: Dedicated to the storage location of the secondary shared library files on the x86--64 system;

/etc: Configuration file directory (most are plain text files)

/home/username: General user home directory;

/root: Administrator's home directory;

/media: Portable Mobile device mount point: CDROM usb

/MNT: Temporary file system mount point

/dev: Device files and special file storage location;

B:block Device Random Access

C:character Device Linear Access

/OPT: Third-party application installation location;

/SRV: Data used by services running on the current system;

/tmp: temporary file storage location;

/usr:universal shared,read-only Data Global shared read-only

Bin: An application that ensures that the system has full functionality;

Sbin

Lib:

LIB64:

The header file used by the INCLUDE:C program (describes how the library file is called)

Share: Results in independent data. such as Doc,man, etc.;

Local: Third-party application installation location;

Bin,sbin,lib,lib64,etc,share

/var: variable data log files, etc.

Cachel: Application Cache Data Directory

LIB: Variable state information

Local: Special language for/usr/local storage of variable data

Lock: Lock file

LOG: Logs directory and files

Run: Running process-related data: PID programs typically used to store processes

TPM: Temporary files that are dedicated to the system restart process

Spool: Application Data Pool

/proc: A virtual file system for outputting kernel-related process information

/sys: Virtual file system for outputting information about hardware devices on the current system

/selinux: Strengthen security policy. Where information such as the relevant security policy is stored.

Components of an application on Linux:

Binaries:/bin,/sbin/usr/sbin,/usr/local/bin,/usr/local/sbin

Library files:/lib/lib64/usr/lib/usr/local/lib/usr/local/lib64

Configuration file:/etc//etc/directory/usr/local/etc

Help file:/usr/share/man/usr/share/doc/usr/local/share/man/usr/local/share/doc

File types under Linux:

-(f): Ordinary documents

d: catalog files;

B: Block device files

C: Character file

L: Symbolic Link file (only soft link)

P: Pipeline File

S: Socket file: Socket; (similar to collapse host communication)

System Management Class commands

Shutdown: Halt,poweroff,shutdown,init 0

Restart: reboot

-F: Force, do not call shutdown

-P: Power off

Shutdown:-r:reboot-h:halt

-C: Cancel shutdown or restart operation

Now: +m: Relative time +3m hh:mm: Absolute Time representation

User login Information View command:

WHOAMI: Displays the active user who is currently logged on

W: All current logon sessions and actions on the system.

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Linux root directory comments, file types and application components