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The shell script is multithreaded, which is somewhat difficult to understand because it is implemented with named pipes. Multithreading means that what was originally done by one process is now done by multiple threads. If a process needs 10 hours to complete something, now allocate 10 threads, divide them up, and then do it at the same time, ...

If you want to be a website, you first need to purchase a domain name, not buy it, but rent it, because you will have to pay a fee each year if you want to use the domain name.Since it is a lease, there is a time limit. If there is no renewal before the expiration date, the domain name will be withdrawn and others can register and use it. When ...

Links to the original text: https://www.cnblogs.com/zeroingToOne/p/8987554.html https://www.cnblogs.com/zeroingToOne/p/8987554.html Wechat applet interacts with java background - zeroing ToOne - blog Park ...

There are many text processors or text editors in Linux/UNIX system, among which grep, sed and awk are commonly used text processing tools in shell programming. Therefore, they are widely called "Three Swordsmen in shell programming". grep command tool The grep command tool, which is often used in daily life, is not to mention here. ...

Original Link: https://blog.csdn.net/dongge825/article/details/8025451   VBScript is short for Visual Basic Script, Microsoft Visual BASIC scripting language, sometimes abbreviated as VBS.It is a lightweight interpretive language in M ...

MongoDB Learning Notes (3) - Mongo Shell Common Query Command The version of MongoDB used in this article is 4.0.10 > db.version(); 4.0.10 1. find command for brief query Find (query condition, field returned) 1. Return all fields when querying Db. user. find () - > Query all data in the user collection > db.user.find() { "_id" : Obj ...

1. ansible batch operations and configuration management: In this blog, the following points of knowledge and practical experience are mainly explained for your reference: Introduction to ansible: _2. Use of common modules in ansible: _3. Use of ansible playbook: 1. Introduction to ansible: 1.1 Introduction to Ansible:_ansible is a python-base ...

Understanding the basic concepts above, we need to apply what we have learned in practice, how to achieve inheritance in the end? What are the ways to achieve it? Following is the main description of the three most commonly used ways to achieve inheritance, which can meet the basic development needs. ...

problem 1. Implementation of CD command (cd, CD ~, CD -, CD path) Because the CD command is built-in in shell command, it can not call the command of the system to implement cd, so it has to be handwritten. The functions used are: char * getcwd(char * buf, size_t size); //Get the current working d ...

Holiday first \(Blog\) is Pigeon's first semester ranking 233 Here are some common sorting and optimizations ~ Insert Sort\((Insertion\) Select Sort\((Selection\) (Sort)\) Bubble Sorting((Bubble\) Sort\) Hill Sort\((Shell\) Sort\) Heap Sorting((Heap\) Sort\) Quick Sort\((Quick\) Sort\) Merge Sort\((Merge\) Cardinality Sort\((Radix\) (So ...