Linux

1. Stop the database using Sql*plus[email protected] oracle]$ sqlplus logsql> connect/as sysdbasql> shutdown [immediate]sql> Exit2. Stop Listener[[email protected] oracle]$ Lsnrctl stop3. Stop the HTTP service[[Email protected]/root]# service httpd

The spark ecosystem, also known as Bdas (Berkeley data Analytics stack), is a platform designed by the Berkeley Apmlab Lab to showcase big data applications through large-scale integration between algorithms (algorithms), Machines (machines), and

1. Introduction to file PermissionsThere are 9 Linux file permissions, three groups representing, owner, group, others, each group also contains r,w, x three states.2. Modify permissions based on numbersR, W, x Three permissions are represented by

Sea SpiderHttp://docs.hi-spider.com/user_guide.V8/index.htmlSea Spider routing system is not high on disk, as long as 1 GB storage space. Now with the electronic disk, CF card, SD card prices continue to decline and the speed of continuous

Original: Windows Phone 8.1 Development Technology Overview (Universal APP)A moment ago really lazy WP8.1 has come out so long time now just update blog Let everyone wait, today I first introduce WP 8.1 development framework, what is Microsoft's

Focus: The idea of solving problemswww.cnblogs.com/rollenholt/archive/2012/09/01/2667184.html Linux Operations - rollen Holt-Blog ParkPhorum.vbird.org/viewtopic.php?t=96 's Linux Private cuisine-novice discussion area? Examine the topic-[share] the

The top command is a common performance analysis tool under Linux that shows the resource usage of individual processes in the system in real time, similar to the Task Manager for Windows. Here is a detailed description of how it is used.Top-02:53:32

Original address: http://www.cnblogs.com/88999660/articles/1581524.htmlcommand to enter VIVI FileName: Opens or creates a new file and places the cursor at the beginning of the firstvi +n FileName: Opens the file and places the cursor at the

Command Arrangement; 1. Use ";" Command syntax: command 1; command 2 When you execute this command, whether or not the command 1 has an error, Execute Command 2. 2. Use "&" Command syntax: command 1 & command 2 When you execute this command,

A mutex is a lock. when accessing data, only one thread can access data at a time. After the data is accessed, the lock on the mutex is released. A condition variable is a mechanism for synchronizing global variables shared by threads. It mainly

First of all, we need to know that although the file synchronization udp between the two hosts is not secure, its synchronization rate is much higher than tcp. This is undeniable. Let's take a simple example: Server: Allows other hosts to

You can use terminal commands to download files, diagnose network problems, manage network interfaces, and view network statistics. This article collects proven and reliable commands and several new ones. Most commands can be executed on the graphic

Psdash is a web panel for viewing Linux system information. Like Glances, another system monitoring tool we mentioned previously, psDash's system information is collected by psutil. Unlike Glances, psdash does not provide APIs and only provides a

Have fun playing Linux! Haha. Don't believe it. Remember me, at the end of the article, you will believe that Linux is really fun. 1. Command: sl steam locomotive) You may understand the 'LS' command and often use it to view the folder content.

  Dear Linux geeks, in this article, I will guide you on how to analyze disk usage in Ubuntu. To ensure the health and smoothness of the system, you are always concerned about the machine's hard disk. It is very important to properly run some

Have you heard of "quick reading? To be honest, neither have I. Until a new company named Spritz raised 3.5 million seed funds to develop an API that enables users to read 1000 words per minute. The concept of "quick reading" is very simple:

During our study of Linux, we often encounter problems that cannot be solved. This article explains how to create snapshots using Linux commands. A vm snapshot is a good function that can save the status of the current VM. Unfortunately, open-source

In Linux, the top command is used to display the real-time status of processes running in the system. It displays some useful information, such as CPU utilization and memory consumption, and the status of each process. But, do you know? There is

You can use neat, netconfig, and ifconfig to configure IP addresses in linux. The first two of them have a user interface, and the third command only sets the IP address temporarily. After the machine is restarted, the configuration will be

1. Modify the file user group chgrp in linux: Short for change group. Modify the user group to which the file belongs. Chgrp users test. logAfter modification, view ls-l -Rwxrwx --- 1 work users 0 Jun 8 :46 test. logIf you want to modify all files