Five Week third session (January 10)
8.1 Shell Introduction
8.2 Command History
8.3 Command Completion and aliases
8.4 Wildcard Characters
8.5 Input and output redirection
Shell IntroductionThe shell is a command interpreter that provides interaction between the user and the machineSupports specific syntax, such as logical judgment, loopingEach user can have their own specific shellCentOS7 default shell is bash (Bourne Ag
Tags: shell introduction, History commands, command completion and aliases, wildcard characters, input and output redirectionShell IntroductionThe shell is the intermediate medium used when the system interacts with the computer hardware, and it is just a tool of the system. In fact, there is a layer of stuff between the shell and the computer hardware-the system kernel.The user directly faces not the computer hardware but the shell, the user instruct
Use of History in ExtJS
// The form object has a record history object-history. This object can be used to achieve previous pages, next pages, and other effects. // Example: history. go () Next page, history. go (-1) Previous Page // use Ext. before
Now the front-end framework is endless, greatly facilitates the development of our normal work, improve the efficiency of development, however, in the process of using the framework is necessary to understand some of the features of their own native JS implementation of the function.I've been interested in the routing of some of today's frameworks, and today I'll talk about my learning experience in front-end routing.What is routing? My understanding is that without refreshing the page, by chang
Javascript advancedProgramAs mentioned in design (version 2), location. Path/query in Bom ...... (Window. Location) after being changed through JavaScript, the browser will refresh the URL you changed (location means location ..)
Since JavaScript MVC began to become popular, the method of modifying the URL through refresh made people feel annoyed. However, HTML5 creates an API that can be used to modify the URL without refreshing the browser, that is, the
I. Mainly use the interface implementation provided by the COM component. Several interfaces include:1. iurlhistorystg and iurlhistorystg2 (iurlhistorystg2 interface inherited from iurlhistorystg)
2. ienumstaturl
The following interface information is taken from msdn
Iurlhistorystg Interface
This interface manages Microsoft Internet Explorer history for the current user.
Iurlhistorystg members
Addurl
Places the specified URL into
The Linux history mechanism numbers the commands entered on the command line and saves them to maintain the command history. Commands entered during a logon session are saved in shell memory and added to the history file if the Abort command is removed.1. Arrow Symbol Direction keyUse the arrow keys on your keyboard to get historical instructions from a
course, you can also use the $ (command) Form for command substitutionEcho: Output a sentence, the script is useful, equivalent to the C language of printf, the shell also has printf650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/4C/D7/wKiom1RGHaKDQNswAADrUlWNag8418.jpg "title=" Datesss4.png "alt=" Wkiom1rghakdqnswaadrulwnag8418.jpg "/>${name} This is a reference environment variable, where {} can be omitted in most cases, but as${PATH}BBBB This situation can not be omitted, after th
Solution to form data loss after phphistory. back is returned, history. back. Phphistory. solution to form data loss after return, history. backjs uses history. the main cause of data loss in the back returned form is the use of session_start ();, which is php history. solution to form data loss after return,
In daily work, the ability to use commands quickly and accurately is essential, so let's introduce some of the tips below.First, find the command history--historyUse history to quickly find the commands you've entered before.# HistoryAs you can see, the commands you have entered appear in the list. What's the use of the command number in front? See below for a detailed explanation.Additional options:#
Let router = new Vuerouter ({
Hashbang:true,
History:true,
Savescrollposition:true,
Transitiononload:true
})
The reason why I opened the history of Vue-router, I think it is convenient to use its positioning function, is to return from the Detailed page list page can be automatically positioned.
But it brings a refresh problem.
Do not use the History,url format for http://xxx.xxx.xxx/index#!goodslist
After
The history record has entered commands without any parameters and displays the default number of command histories directly.(1) View and modify history settings.in the user's home directory, such as the/root directory, exists. Bash_profile and . Bash_profile these two files. which . Bash_history is the history of the command that records the number of directory
1,histtimeformat display user name and time# export histtimeformat= "' WhoAmI '%F%T"# History | Tail1032 Root 2015-05-28 13:57:22 ll1033 Root 2015-05-28 13:57:26 pwd2,histsize Total Row count of the control history command# Export histsize=2000# Export histfilesize=2000HistsizeDefines the number of records for the history command outputHistfilesizeDefines the tot
Using the computer for a long time, will clean up the computer, some historical records to clear, so that the computer can run faster, Xshell is the same truth. This episode teaches you how to clear the history of Xshell. How to Clear history: 1. Open Xshell, then click "Tools" and select "Options". 2. In the popup dialog box, select "General" and click "Clear" 3. Tick "Clear
How many commands will be saved under the Linux system and the history command? Once in a book, if the system is unregistered, then all the historical commands will be set into the ~/.bash_history,However, only 1000 commands are reserved (this is set by the default shell variable) But why do we have a history of more than 1000 after we execute the historical command?In fact, when we look carefully only the
Standard definitionThe management of history, like HTML page loading, has its corresponding standards. The address is as follows: WhatWG: https://html.spec.whatwg.org/multipage/browsers.html#historyAmong the key points about history are the following:
1. Prior to onload, navigation operations caused by non-user actions do not establish historical entries.
Non-user actions such as the specified timer
The steps are as follows:
1, create a file to store commonly used commands, such as/root/history.txt, write the common commands as text, each command occupies one line
2, run history-c in the terminal, clean up the messy history record
3, run History-r/root/history.txt, read the command as the history of the current
Tags: Shel from show and off with Ted add HelpIn 12c, Oracle introduced the History command, which is much like the history in the Shell, reducing the knock-down of SQL and bringing a lot of convenience.1. View the history HelpSql> HelpHistory-------Stores, lists, executes, edits of the commandsEntered during the current Sql*plus session.Hist[ory] [N {RUN | EDIT
First, Shell introductionIi. History of the OrderHistorical command Store path/root/.bash_history, default can hold 1000 commands#history//View specific history commands[[email protected] ~]# echo $HISTSIZE//system built-in environment variable1000#history-c//Clears the In-memory command
The History object contains the URLs that the user has visited (in a browser window).The history object is part of the Window object and can be accessed through the Window.history property.Note: There is no public standard applied to the history object, but this object is supported by all browsers.The History object re
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