Basic operation of Linux system

First, the basic command
1. Change directory: CD directory name
2. Create file: Touch file name
3. Delete files: RM-RF file name
4, change the file path or change the filename: MV source file Destination file
5. Shutdown: Init 0
6. Restart: reboot
7. View Ip:ip A or ifconfig
8. View system Current Date: Date
9. View Current User: WhoAmI or who I am
10. View current path: pwd
11, modify the IP configuration file: Ls/etc/sysconfig/network-scripts/ifcfg-ens33

Second, the file system directory structure
Media: Medium Folder
Home: Household Directory
Root: Super Admin home Directory
Dev: Hardware Device folder
ETC: System configuration folder (Modify system settings)
TMP: System temp File Folder
Boot: System boot Boot folder
USR: Custom program installation folder
var: System log Folder

Third, the meaning of the prompt symbol
[Email protected] ~]#
[\[email protected]\h \w]\$
Root: \u Current Account
localhost: \h hostname The first point in front of the name Localhost.localdomain
~: \w The home of the current account, here is the root user's home
#: Prompt, which represents the current user as an administrator, super user
$: Representative is currently a regular user

Four, Shell syntax
[Email protected] ~]# ls-a/home/
Command option Parameters
Command: The body of the entire shell command
Options: Affects the behavior of fine-tuning commands, usually in-,--
Parameters: The object to which the command works

Five, shortcut keys
^C: Terminate the program running in the foreground
^d: Exit, equivalent exit
^l: Clear Screen
^u: Delete all characters before the cursor
^k: Delete all characters after cursor
^r: Search history commands, using keywords
esc+. : Reference the last parameter of the previous command, equivalent to! $

Vi. Basic features of Bash
1. <Tab> key, auto-complete command and file
2. Historical command:
A. Cursor up and DOWN keys
B. ^r//Search history commands, using keywords
C.! $//reference last parameter of previous command
D.! string//Executes the specified command in the history command, with an exclamation mark followed by a string or a number representing the command
3. Command aliases
To view the current alias of the system: Alias
To view the alias of a specified command: type-a command

                建立永久别名：  vim /etc/bashrc                                       alias 自定义别名=‘命令‘                建立临时别名：  alias 自定义别名=‘命令‘                取消别名：  unalias 自定义别名                别名优先：  命令 //                跳过别名：  \命令 //

4. How to get Help
Help: Command--help
Man:man command
Command Help--1,8
function Help--2,3
File Format--5
Official Handbook: http://docs.redhat.com Enterprise Linux (5/6/7)
http://www.mysql.com docs
Baidu, Google

Basic operation of Linux system