Share Linux CentOS7 VMware system directory structure, ls command, file type, alias command--notes

First, the system directory structure

To build a directory tree structure:

Tree-a Show All

Tree-d Show only Directories

Tree-l n N Represents the number: Indicates how many layers to display ...

TREE-F Displays the full path:

Yum install-y Tree

Tree--hep

Mans Tree

Second, ls command

List Full Write

LS Shorthand

LS/Displays the non-shadow files and directories in the current directory

Related directives:

ls/bin/
ls/sbin/
ls/boot/

Ldd/bin/ls
Ls/lib Library file

Ls/lib64

ls/proc/Process LS/PROC/1

ls/usr/

Ls/usr/lib/usr/lib64

Ls/war/log/messages
ls/var/run/
ls/usr/bin/usr/sbin/bin//sbin//etc//var//usr/local//proc/

Iii. Types of files

LS directory: Specifies the directory to display the list, or it can be a specific file

LS-A displays a list of all files, including shadow files, in the current directory

Ls-l Output Long Format list

ls-i-L display inode information for a file

The index node (the index inode is referred to as "Inode") is a special concept in Linux, and two text with the same index node number is essentially the same file (except for the file name).

Ls-la is to list all files and directories in the current directory, including hidden files and directories

Ls-l/bin/ls compiled files cannot be viewed

Ls-l/dev/log Communication S opening file

D: Catalogue

-: Normal document, binary

C: String

B: Block device (Optical drive, CD-ROM)

S:socket file

L: Then link file

Iv. alias Command

Alias to see if the command has an alias

Example: Aliases for davery: Alias davery= ' LS-LHB '

Alias: Unalias Davery

The which command is to find out if a command exists, and where the command is stored

Share Linux CentOS7 VMware system directory structure, ls command, file type, alias command--notes