02-03-linux Root File system detailed

File system:

Rootfs: Root file system

FHS: File system level standard, which specifies the directory that Linux distributions should create

/boot: System boot related files, such as kernel, INITRD, and Grub (bootloader)

/dev: Device files

Device files

Block device: random access device; data block; hard disk

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

Character device: Linear access device, by character, keyboard, mouse, monitor

/etc: Configuration file

Home directory for users, the home directory of each user is usually the default of/home/username

/root: Admin Home Directory

/lib: library file Libary

Static library;. A

Dynamic library;. Dll,so (Shared object) Dynamic shared object

/lib/modules: Kernel module files

/media: mount point directory, mobile device

/MNT: mount point directory, additional temporary file system

/misc: Miscellaneous

/OPT: Optional directory, installation directory for third-party programs

/proc: Pseudo file system, kernel mapping file

/sys: Pseudo file system, property mapping file related to hardware device

/tmp: Temp file system,/var/tmp

/var: a variable file

/bin: Executable file, user command

/sbin: Managing Commands

/usr: global shared read-only file shared,read-only

/usr/bin

/usr/sbin

/usr/lib

/usr/local Some files that store third-party software

/usr/local/bin

/usr/local/sbin

/usr/local/lib

Naming rules:

1: cannot exceed 255 characters in length

2: Cannot use/when file name

3: Strictly case-sensitive

Relative path: Destination file path relative to the current location

Absolute path: The path from the root to the destination file

File Management

Touch: Modify the timestamp or create a file

-C: Do not create files

-A: Change access time only

-M: Change Modify time only

Change time will vary with atime and mtime.

-a-t time: Can modify atime for a specified time

-m-t time: Can modify mtime for a specified time

You can also create a file using a text editor

Nano

VI or VIM

RM: Deleting files

-I: prompt whether to delete

-F: Do not prompt for immediate deletion

-RF: Delete directory and recursively delete all files in this directory

Directory Management

Ls

Cd

Pwd

mkdir: Creating an empty Directory

-P: Create a multilevel subdirectory

{}: Command line expansion; Mkdir-pv/mut/test/{x/m,y} create x/m and Y directories under test; Mkdir-pv/mnt/test2/{a,d}_{b,c} create A_b,a_c,d_b,d_c four folders under Test2

-V: Show Command execution details

Tree: Viewing the directory tree

RmDir: Delete directory (only empty directory can be deleted)

-P

Run the program

Device Management

Software Management

Process Management

Network management

This article is from the "Lemon" blog, be sure to keep this source http://xianglinhu.blog.51cto.com/5787032/1620349

02-03-linux Root File system detailed