Bash For Example

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Use crontab regularly in the Linux PHP script

This method is urgently needed to record what time to try ^^ In Linux, you can use the crontab + php method: 1, the use of crontab-e edit the contents of regular tasks: xx: xx: xx Execute a test.php File 2, php file must be in the first line of the file, with the interpreter path (as perl do) #! / Usr / local / bin / php PHP implementation requires Apache support, she ...

Deep analysis of the namespace technology behind Docker

I believe you have seen in many places "Docker based on Mamespace, Cgroups, chroot and other technologies to build containers," but have you ever wondered why the construction of containers requires these technologies?   Why not a simple system call? The reason is that the Linux kernel does not have the concept of "Linux container", the container is a user state concept. Docker software engineer Michael Crosby will write some blog posts and dive into Docke ...

8 Models for developing Docker containers

"Editor's note" Vidar Hokstad is very experienced in Docker use, especially in the absence of data loss, the use of Docker to create a repeatable build on the experience, in this blog, he summed up the development of the Docker container 8 modes. Docker is now my favorite tool, and in this article I will outline some of the patterns that recur during my use of Docker. I do not expect them to bring you many surprises, but I hope that these can be useful to you, I am very willing to communicate with you in the use of ...

Fish a very friendly shell, highly recommended!

The friendly interactive shell, just like its name, fish is a very friendly shell, highly recommended! Use the command sudo apt install fish to install it. When you are done, run the command fish to switch to fish and exit back to bash. A brief introduction to its advantages: automatic completion, syntax highlighting the automatic completion of bash is only the completion of the full command, the path, if you want to complement the full variable, parameters, etc., usually need to use complex combination ...

How to simulate DOS commands in a Linux environment

You can use the flexibility inherent in the command shell of Linux to create scripting languages that help you simulate DOS commands in a Linux environment.      The specific approach is as follows. If you are an IT support expert, you like the command of Windows very much, when you first use the Linux command line, you may soon find yourself confused. The DOS commands you've been familiar with for a long time don't exist in Linux. So you will find yourself facing a terrible task: to learn and be familiar with the whole ...

How to design your own personalized x session by editing the shell script

This page will teach you how to design your own personalized x (graphics desktop) session by editing the shell script. Desktop environments like Gnome usually have their own session manager. These session managers allow you to set what additional programs will be loaded at startup by providing a graphical interface. However, knowing how to create an X session script allows you to have greater flexibility in defining your desktop environment, whether you use Gnome, KDE, XFCE, Openbox, or any of the less-known window managers, like Blackbox or fvw ...

Hadoop distcp

Overview distcp (Distributed copy) is a tool for copying within and between clusters of large clusters. It uses Map/reduce to implement file distribution, error handling and recovery, and report generation. It takes the list of files and directories as input to the map task, and each task completes a copy of some of the files in the source list. Because of the use of the Map/reduce method, the tool has a special place in semantics and execution. This document provides guidance for common DISTCP operations and describes its working model. Use method Basic Use Method D ...

Learn more about Hadoop

-----------------------20080827-------------------insight into Hadoop http://www.blogjava.net/killme2008/archive/2008/06 /05/206043.html first, premise and design goal 1, hardware error is the normal, rather than exceptional conditions, HDFs may be composed of hundreds of servers, any one component may have been invalidated, so error detection ...

Instructions for using the Network Management command finger in Linux

This command can be used to query http://www.aliyun.com/zixun/aggregation/10619.html > user information and to view the default user environment. For example: [root@teacherroot]# finger-1 root login:root→name:root directory:/root→shell:/bin/bash on since Mon June ...

Instructions for using Process management commands in Linux

Kill this command terminates a program. For example: [root@teacherroot]# kill 3793 Base:kill: (3793)-Not that process PS This command is used to display the state of the program. Examples are as follows: [root@teacherroot]# PS PID TTY time CMD 3644 pts/0 Unlimited bash 3852 pts/0 unlimited PS [root@teac ...

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