Linux 15th day vim and Scripting basics

Linux 15th day vim and Scripting Basics

Time: 20180801

Vim Text Editing Tool

Command mode

Y copy

P Paste

G Navigate to document to first line

G navigates to the last line of the document

^ Position the front non-null character of a row

0 position the absolute beginning of a line

$ locates the end of a line

W jumps to the header of the next character

B Jump to the first character's header

e jumps to the tail of the next character

U Undo Last Action

R replaces the current character with the specified character

Ctrl+r undo the last Undo

. Perform the Last Action

V Visualization mode

Enter edit mode

I insert mode

A enters edit mode behind the current character

c Change, change the character

Last-line mode

W Save

Q exit

! Force or command in the back to temporarily execute the command

X Save exit

R read into a document content

Adjust VIM working characteristics

Last-line mode

: Set Num|nonu Display line number

: Set Ic|noic ignoring character case

: Set Ai|noai Auto Indent

: Set Si|nosi Smart Indent

: Set Hl|nohl Search highlighting

: Syntax On|off syntax highlighting

: Set List|nolist Displays special characters

: Set Fileformat=dos:unix | Set ff= (Dos|unix) settings File Save format

: Set Coursorline cul nocul positioning cursor in the row

: Set paste|nopaste copy reserved format

: Set Tabstop|ts=num sets the TAB key to how many characters can be skipped at a time

xDD making a 16 binary file or converting the file

Script

Scripting specifications

The language used by the first behavior call

FileName:

Version:

Change Date:

Author:

Description:

Variable effective Range

Local variables

The effective scope is the current shell process, and other shell processes other than the current shell, including the current Shell's

Child processes are not valid

Environment variables (global)

The effective scope is the current shell process and its child processes

Local variables

The production range is a piece of code in the current shell process, usually referred to as a function

Positional variables

The script itself is the name

$1,$2 ... Refers to the arguments that are followed when the script is called

Special variables

$* all arguments after the script is referenced, but turns it into a string

$# number of parameters after output script

[email protected] references all parameters after the script, but one reference

$? Output previous command execution status return code

Numeric operations

Let VAR=ARG1+-*/%ARG2

var=[$a + $b]

var=$ (($a + $b))

var=$ (expr ar1 ar2 ...)

Logical operations

&& | | Or! Non -

Pstree Show Process Tree

Export displays all of the current environment variables

Unset the variables that were set before the undo

ReadOnly setting read-only variables

Declare

-R Set read-only variable

-X Sets the following variable to the environment variable

-I sets the following variable to a numeric variable

Printenv Show all current environment variables

ENV outputs all environment variables for the current user

Shift move position variable, replace the original $ $ with $ $

SCP to copy files to remote, or remotely copy files to local

Linux 15th day vim and Scripting basics