pmp study notes

Linux Study Notes (11) software package management, linux Study Notes Linux software packages include the source code package (script installation package) and Binary Package (RPM package and system default package ). The advantages of the source code package are: 1) The source code package is open-source. If you have

Linux O M Study Notes MySQL backup and recovery (incremental recovery) tutorial, Study Notes mysql Chapter 2 MySQL backup and recovery advanced-incremental recovery I. Under what circumstances do I need incremental database recovery? 1. Do I need incremental recovery if the master database or slave database goes down

Linux coredump Study Notes and coredump Study Notes Beginner's notes:In the case of exceptions in linux programs, the process will be down. Most servers will set up to generate core files. In actual operation, I have encountered a process that keeps core and is automatically monitored and pulled up, if a core exists af

[Study Notes] [C Language] array, Study Notes Array1. What is an array? Array, literally, it means a group of data. Yes, arrays are used to store a group of data.2. array features Only one type of data can be stored, such as an array of the int type and an array of the float type. The stored data is called an "element"

[Study Notes] [C Language] type specifier, Study Notes C Language1. short and long 3. Code 1 # include

My MYSQL Study Notes (3) -- operators, mysql Study Notes 1. Security equals operator ( Select null Note that the difference between this operator and equal to (=) is that when both values are null, the execution result is as follows: 2. LEAST OperatorPurpose: obtain the minimum value among multiple parameter value

Lua Study Notes 11: Tips in lua, lua Study Notes The tips in lua are the special features of the basic lua language. Clever Use or x = x or v It is equivalent: if not x then x = vend If x is nil or false, assign it a value Binary ternary operator implementation a and b or c Similar to C language: a ? b : c

March 31 Study Notes (CSS part), March 31 Study Notes css Background attributes Text attributes The direction attribute affects the writing direction of the text in the block-level element, the direction of the column layout in the table, the direction of the element box filled with content horizontally, and

Database Study Notes (3), Database Study Notes Tip: To run a program, you must first add the database to the specified folder, For example, if E: \ DATA is written in the code, you must first create a folder in E: \, and then compile and execute the database code. -- Add studentfgrp file groups to the database, and

Golang Study Notes [5] integer and golang Study Notes integer Golang has many integer classes, but generally it is better to use int or uintt, Package mainimport ("fmt" "unsafe") func main () {var i1 int8 = 1 // 1 bytevar i2 int16 = 2 // 2 bytevar i3 = 3 // 4 bytevar i4 int64 = 4 // 8 bytevar i5 int = 5 // 32-bit: 4

Sqlite Study Notes 10: Using sqlite to query and update data in C language, sqlite Study Notes The third parameter in sqlite_exec () mentioned above, SQLite will call this callback function for each record processed in each SELECT statement executed in the SQL parameter. This section adds two functions: selectFromTable

Java Study Notes 30, java Study Notes The sortedlist class is the implementation class of the List interface. It is a List set and allows random access to the collection elements based on the index. In addition, the consumer list is also real The Deque interface can be used as a dual-end queue or a "stack. A chain-bas

Sqlite Study Notes 4: Create and Delete tables and sqlite Study Notes If you have done so much, isn't it just to get a few tables for data? Let's take a look at how to create a new table. 1. Create a table The basic syntax is as follows: CREATE TABLE database_name.table_name( column1 datatype PRIMARY KEY(one or mor

Sqlite Study Notes 2: Create a database and sqlite Study Notes In the last note, an sqlite executable file is generated, and cd is executed under the directory where sqlite is located: Sqlite3 MyDataBase. db A database named MyDataBase. db is created, and a file named MyDataBase. db is generated under the curren

Java study notes 28, java Study Notes Vector is the implementation class of the List interface and supports all functions of the List interface. The Vector class is a List class implemented based on arrays and encapsulates a dynamic, The Object [] array that allows redistribution. The Vector is thread-safe and require

Linux cloud computing cluster Architecture Study Notes: 1-1 rhel7 basic commands, Study Notes rhel7 1-3-RHEL7Basic commands 1.1LinuxTerminal introduction Shell prompt Bash Shell basic syntax. 1.2Use of basic commands: ls, pwd, and cd. 1.3View the system and BIOS hardware time. 1.4LinuxHow to get help, Linux shutdo

[Struts2 Study Notes (5)] processing process and working principle of Struts2, struts2 Study Notes (1) Struts2 processing process (2) processing functions 1. strutsPrepareAndExecuteFilter is the core controller of Struts 2 Framework (after Struts 2.1.3, org. apache. struts2.dispatcher. filterDispatcher has been marked

PHP Study Notes (4) and php Study Notes Some functions in the Wordpress framework: Wp_get_nav_menu ($ default ):Obtain menus Based on the condition $ default. All menus are obtained by default. $ Default is shown as follows by default: $default = array( ‘theme_location’ =>'', 'menu' =>'', 'container' =>'div', 'cont

HTML Study Notes (5): html Study Notes 1. Javascript is a scripting language that provides user interaction, dynamic content modification, and data verification. 2. We use the script tag to embed javascript statements into html documents. 3. The script tag pair can be placed in either the head tag or the body tag. 4. I

My java Study Notes (13) Reflection (part 2), study notes Whining... This evening is a bit of a thing... As a result, there was no eclipse in the lab, and the command line was used. As a result, the environment variables were not properly configured for a long time .. Now .. Ah .. 1. The key method for viewing object