easy scripts to read

necessary for all developers. In order to teach the correct annotation technique, I often add comment code in my own demo program. Also, to simplify the annotation process, I recommend that developers first write comments explaining the programs they want to write. I will first write the procedure, class, or other program elements in the program, but do not elaborate on its specific workings. Then I'll write a series of comment codes that describe each of the main steps of the process or the el

Process and port query command combinations and simple scripts that are easy to use when developing and debugging Linux services Several useful processes and port query command combinations and simple scripts (ps netstat awk grep) during Linux service development and debugging ). The flume service has been built and developed under its framework over the past few

*: Very dangerous operation, because/foo foo may not exist, then this sentence will be deleted in the/directoryCorrect: Cd/foo RM *; Execute multiple statements based on the return value of the CD so Cd/foo | | Exit 1;CD. Rm....[bar = = "$foo"]: When you study, you say it very clearly. [] is not supported for a comparison other than =, and = is used only on the comparison of stringsfor i in {1..10};d o something ;d One error, this is directly removed; Because can play a role in segmentation[[

These days in the construction of Flume service and development in its framework, repeatedly debugging input commands to take the trouble, so here to record some of the tips you find:First of all, it is a good choice to make a service of your own application, a service needs to support start and Stop,start to launch the program, stop can find the process of START program and turn it off.Can be changed directly according to the service script under/etc/init.d/, but I have a problem: because those

Company needs to build the company's internal system, need to use to unified certification, in view Shiro and other discovery access without clue, and there is no control, for the certification system is highly available, reliability will appear extremely important, so I decided to manually set a unified certification solution.Through the Springboot framework, the author has written a set of unified authentication solution, which has been used in the company's internal CRM, authority system and

When easy_install is used on some Linux machines to install MySQLdb, the web. py makes several RESTful APIs and several webpages. To interact with MySQL, you need to use the Python library MySQLdb. When you use the "sudo easy_install MySQL-python" command to install MySQLdb, the system prompts"Please install a more recent version first, using 'easy _ install-U distribute '. ", I will execute the" sudo easy_install-U di

Easy to learn JavaScript 26: How to dynamically add JS scripts and CSS styles in DOM programming LearningThe following HTML document code is used: div Region 1. dynamically load external JS files Code for dynamically loading the external index. js file: alert("I am JS file!"); Code for dynamically loading external JS files: // Dynamically load the external JS file var flag = true; // set true and then lo

Python easy_install encounters the "ImportError: Entry point ('console _ scripts', 'easy _ install') not found" error. Recently, crawlers use the well-known Scrapy. But when installing Scrapy, there are many problems. The first problem is that Scrapy is only compatible with Python and later versions. My machine is still using Python2.6, so the first step is to reinstall Python. The specific installation pro

In Linux, how does one read and write XML using shell scripts? An existing config. xml XML version = "1.0" encoding = "UTF-8" ?> Config > Server-IP > 192.168.1.45 Server-IP > Server-Port > 1209 Server-Port > Repository-temp-Path > /Home/John Repository-temp-Path > Config > You need to modify the "server-IP", "server-port" and "import-path", an

, correspondingly, Opening/dev/stdin in the example above). #!/usr/bin/php if (File_exists ($argv [1])){$file = $argv [1];} else {printf ("Error:file ' $file ' does not exist!");Exit 1;}$data = file ($file);$c = 1;foreach ($data as $line){printf (sprintf ("[%s]:%s", $c, $line));$c + +;} In the example above, the PHP script will read each row passed to the command line file and output it immediately following the current number of rows. If the file doe

Perl is the preferred language for interpreting Linux Command Line scripts. Today, we have more options, including Python, Ruby, and PHP. If you have already compiled PHP code for your website and are familiar with this language, you will find that using PHP on the command line is fast and the effect is amazing.In scripts, one of the biggest functions of any scripting language is to operate on files and obt

$DATABASE-H SELECT * FROM $TABLEEofHTML format is poor readability, the output is as follows:Copy the Code code as follows:Readability is also understandable, because people feel that you do not need to modify it, directly in the form of HTML display data.Copy the Code code as follows: id name mark Dept 1 Navin M 98 CS 2 kavya n 70 CS 3 Nawaz o 80 CS 4 Hari s 80 EC 5 Alex m 50 EC 6 Neenu j 70 EC 7 Bob a 30 EC 8 Anu m 90 AE 9 Sruthi 89 AE 10 andrew 89 AE The data in the form of X

Use bash to read and write csv file data to one of the scripts of MySQL database, Zookeeper Scenario:There is a csv file containing student details of multiple departments. You need to insert the file content into a data table to ensure that each department generates a separate ranking list. The data in the studentdata.csv file of the learning information table is as follows: 1,Navin M,98,CS2,Kavy

Scenario: a csv file containing student details of multiple departments needs to be inserted into a data table to ensure that each department generates a separate ranking list. The data in the studentdatacsv file of the learning information table is as follows: 1, NavinM Zookeeper Scenario:There is a csv file containing student details of multiple departments. you need to insert the file content into a data table to ensure that each department generates a separate ranking list. The data in t

shell-mysql (1) Script background: Because to be on Linux, remote read MySQL table data, and then do a certain cleaning, upload data to the Hadoop cluster, use Java to write it, feel too troublesome, have to develop on win, also have to play into jar package, upload to Linux, if there is a problem, Also have to repeat this, very inconvenient, then use the shell to write a bar, and do not need any JDBC driver package, only need to install a MySQL clien

, correspondingly, Opening/dev/stdin in the example above). #!/usr/bin/php if (File_exists ($argv [1])){$file = $argv [1];} else {printf ("Error:file ' $file ' does not exist!n");Exit 1;}$data = file ($file);$c = 1;foreach ($data as $line){printf (sprintf ("[%s]:%s", $c, $line));$c;} In the example above, the PHP script will read each row passed to the command line file and output it immediately following the current number of rows. If the file does n

In front-end development, we can't help but use read/write cookies and dynamically introduce js scripts and other related operations. How can we achieve this? See the following js functions: [javascript] varJsHelper {CreateJS: function (url) {varhdocument. getElementsByTagName... Synt In front-end development, we can't help but use read/write cookies and dynamica

Scene:A CSV file that contains student details for multiple departments requires inserting the contents of a file into a data table, ensuring that each system generates a separate ranking list.The data for the Learning Information table Studentdata.csv file is as follows:1,navin m,98,cs2,kavya n,70,cs3,nawaz O,80,cs4,hari s,80,ec5,alex m,50,ec6,neenu J,70,EC7,Bob A,30,EC8,Anu M,90,AE9, Sruthi,89,ae10,andrew,89,aeScripting ideas:There are two ways to deal with this problem, from the shell script

interagers" A becho "$A plus $B is: $[$A + $B]"#!/bin/bash#read-t 5-p "Input [interagers[a=100,b=200]:" A b[-Z $A] a=100[-Z $B] b=200echo "$A plus $B is: $[$A + $B]"#!/bin/bash#read-p "Three files" FILE1 FILE2 file3read-p "Destination" Destread-p "Compress[gzip|bzip2|xz]" compcase $COMP ingzip) tar-zcf ${dest}.tar.gz $FILE 1 $FILE 2 $FILE 3;; bzip2) tar-jcf ${dest}.tar.bz2 $FILE 1 $FILE 2 $FILE 3;; XZ) t

(PACKET) if Packet:byte () ~=proxy.com_querythenset_error ("[admin]weonlyhandle text-basedqueries (com_query) ") Returnproxy. Proxy_send_resultendlocalquery=packet:sub (2) localrows={}local Fields={}ifquery:lower () == "Select*frombackends" thenfields={{name= "BackEnd_ndx ", type=proxy. mysql_type_long},{name= "Address", type=proxy. mysql_type_string},{name= "state", type=proxy. mysql_type_string},{name= "TYPE", type=proxy. mysql_type_string},{name= "UUID", type=proxy. mysql_type_string},{name