Rookie Learn Linux No. 005 Note root file system

First, the file system

Rootfs: Root file system

Fhs:filesystem Hierarchy standard file system level standards

/

/ boot system boot related files, such as kernel, INITRAMFS, and Grub (bootloader)

/Dev Device file:

Block device random device, data block

Character character device linear device, sequential

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

/etc Editable Text configuration file

/ Home User's home directory, which is usually the default for each user's/home/username

/root Root user home directory root user rights are very large (not recommended to use root login in a production environment) only when using the login

/liblibrary files and kernel module files

/lib/modules Kernel module files

Static library . A

Dynamic library . dll. So (Shared object)

/media mount point directory for mounting mobile devices

/mnt mount point directory, which is used to mount additional temporary file systems

/misc Miscellaneous

/optoptinal Optional Directory, third program installation directory (now not stored here)

/proc pseudo file system, kernel mapping file (in fact there is no file) system tuning to use this directory

/sys Pseudo file system, property mapping files associated with hardware devices, managing hardware

/tmp Temporary temp file system

/var variable variable file directory

/binBinary executable directory (user command)

/sbinBinary executable directory (Administrative command)

/usr universal,shared,read-only Global, shareable, read-only

/bin

/sbin

/lib

/usr/local:

/bin

/sbin

/lib

II. Linux Naming conventions

1. Length cannot exceed 255 characters

2. Cannot use/as file name

3. Any other characters can be, strictly case-sensitive

4. The filename cannot be the same as the file name (neither Windows Linux)

Third, document management

TouchChange file timestamps

-c do not create any files

-A change only the access time

-m change only the modification time

-t use [[CC]YY]MMDDHHMM[.SS] instead of the current time

StatDisplay file or file system status

RMRemove files or directories

-I prompt before any removal

-F ignore nonexistent files, never prompt

-R remove directories and their contents recursively

RM-RF/Remember not to use this command, all files will be deleted

Create files You can use the file editor to create

NanoNano ' s another editor, an enhanced free Pico clone

English character ASCII (American standard Code for information interchange)

Store 128 different characters, the computer stores the smallest unit bytes

2^7=0,127000 0000-111 1111

Kanji (GB GB18030 GBK GB2312 Unicode full character set)

2^16

Two bytes a kanji

0000 0000 0000 0000

Iv. Directory Management

Ls

Cd

Pwd

mkdirmake a empty directory

e.gmkdir-pv/mnt/test/{x/m,y} curly braces Expand

MKDIR-PV/MNT/TEXT2/{A,D}_{B,C}

Create catalog A_b a_c d_b D_c

-P No error if existing, make parent directories as needed

-v print a message for each created directory

RmDirRemove empty directories

- p can only delete one vein only son

e.grmdir-p a/b/c/d/

Tree View directory Trees

Run the program

Device Management

Software Management

Process Management

Network management

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Rookie Learn Linux No. 005 Note root file system