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NodeJs concise tutorial will start from scratch to learn about NodeJs and help JS developers build a full stack development technology stack! Focus on getting more NodeJs articles This article is the eighth chapter of NodeJs concise tutorial, which will introduce the basic operation of NodeJs sub-process module. The child_process module provide ...

Reading catalogue url control Basic Routing Writing: Most Commonly Used The second way of writing: inherit the ModelViewSet Third way of writing: (Automatically generating routing, you must inherit ModelViewSet) Parser Different data format requests are made at the front end and the results are pars ...

Preface Sorting is one of the most common operations performed on stored data in a computer. The grammar is simple but exquisite. In the sorting algorithm, loops are indispensable. Only when we study the sorting algorithm in depth, we can find that the usual insignificant loop statements can not be underestimated. Take the simplest bubble sort ...

Disk monitoring is the most basic monitoring, but in many cases, monitoring disks are ignored due to negligence of operation and maintenance, resulting in accidents.Friends who wish to read this article must take monitoring disks seriously. The requirements for this case are as follows: 1) Detect disk condition every minute 2) When disk space ...

1. Installation instructions1. Environmental description System Version Database Version Framework IP Address patch rhel6.9 11.2.0.4 RAC 192.168.3.2 29698727 rhel6.9 11.2.0.4 RAC 192.168.3.3 29698727 2. The software storage location is planned as follows: Software Storage location Grid /u01/11.2.0/grid Oracle /u01/app/oracle/p ...

In native Android system code, the event entity touched already contains a member called displayId. This shows that Android is basically a two-touch framework, and if the display ID of the touch event corresponds to the home screen, then it does. The event is sent to the TouchdedWindow on the home scree ...

User and Group Management 1. User Profile 2. Password Profile 3. groupadd command Examples of main parameters for groupadd: 4. groupdel command Examples of groupdel main parameters: 5. useradd command Examples of main parameters of useradd: 6. userdel command Examples of main parameters of userdel: 7 ...

shell script Learning Guide 2017-03-26 Turn on tracing set -x Turn off tracing set +x This abbreviation is also too bullish i18n: internationalization l10n: localization Regular expression (absolutely something you don't need to forget) Backward Reference awk (again) sed, stream editor sed -n '/Character string/p' file.txt sed -i '/Character ...

In Linux system management, it is sometimes necessary to set account password complexity (length), password expiration policy and so on, which is mainly controlled by some parameters in the / etc/login.defs parameter file. It is mainly used for user account restriction. The parameters are as follows:/etc/login.defs:# Password aging&nb ...

Catalog basic operation 1.1. File operation 1.2. Text operation 1.3. Directory operation 1.4. SSH, System Information-Network Operation Basic Shell Programming 2.1. variable 2.2. String substitution 2.3. function 2.4. condition 2.5. loop Skill debugging 1. Basic Operations a. export Display all environment variables. If you want to ...