Linux

function: Backup files;Tar cvf backup files. Tar backup files or directories;Tar czvf backup files. tar.gz backup files or directories;Tar xzvf backup file. tar.gz backup file or directory-C extracted to the directory;C: (Create) Create a new backup

For people who frequently use Linux systems, the RZ/SZ command is a convenient means of uploading local files to the server or downloading files from the server, but many Linux systems do not initially have these two commands. Today, we will briefly

1. Ensure that the JDK is installed successfully, in version 1.5 or change version, Java and Javac are available.2. Download SCALA-2.10.4.TGZ installation package, extract to the installation directory, it is best to install with the root user,

Starting today, use this blog to record and summarize embedded Linux from getting started to practicing the complete process.The first chapter is the IIC protocol and self-balancing trolley. Set goals First:1, using the MINI2440 Development Board

Process scheduling is responsible for deciding which process to run, when to run, and how long it will run.Process scheduling: Non-preemptive and preemptive typeLinux is such a cool system is of course a preemptive.The time the process can run

A database server has recently been restarted automatically.Checked the relevant login information:look at the user log log under Linux, including the IP of the host that the user is logged in with:What did More/var/log/securewho/var/log/wtmp do?

Linux System Timing Task CrondWhat is Crond?Crond is a service or software that is used on a Linux system to perform regular commands or to specify program tasks.Special needs: (seconds level) Crond service can not be done, general work possessed

User Deployment(Take Bb_hs_pos as an example)Start the database first under Oracle user Su–oracleDbstartDeploy user directory, execute useradd-g dba-s/bin/bash-m with root user Bb_hs_pospasswd Bb_hs_posBb_hs_pos modify the. Bash_profile under

Git local basic operations1. Git introduction (installation and configuration) 1. Git installation (http://www.git-scm.com/download/) 2. Git configuration [git config] About git command query method: The/doc/index.html file in the root directory

How to view the last mail in linux The mail instruction is too bad on the Internet. I will not repeat it again. Here I will only talk about my situation and skills. Recently, due to linux time synchronization and crontab settings, a mail is

TeXLive 2015 in Linux Today, I suddenly found that the text in the pdf compiled by xeLaTeX cannot be displayed in Chinese in the built-in viewer and evince of TeXMaker. The text in the text is blank and the English is normal; however, the Chinese

Install Python 2.7.5 on CentOS 6.4 (64bit) Install Python 2.7.5 on CentOS 6.4 (64bit) (1) Make sure that yum can be used. If the default python 2.6 is uninstalledA. Find the rpm package of python2.6 in Packages of the installation disk. B. Run

Python uses pip to install. whl files Pip is a package manager in python. The package manager is a tool combination that automatically installs, prepares, uninstalls, and upgrades software packages on your computer. Pip can replace the previous easy_

Grep command usage1. grep family Grep: Global search Regular Expression (RE) and Print out the lineThe grep family includes grep, egrep, and fgrep, egrep, and fgrep.Egrep is an extension of grep and supports more metacharacters, equivalent to grep-E.

Configure/compile/run the Cocos2dx project in Ubuntu For project reasons, you need to put a project using cocos2dx in Linux to run (in Windows, you can use VS to write it normally), and debug it for about 3 ~ After four hours, the project was

Use Hexo to build your own blog on Github Previous Blogs were hosted on github using Jekyll. Later, it became increasingly inconvenient to use. For example, if no post is automatically generated and one-click deployment is not supported, the file

Use Eclipse and IDEA to build Scala + Spark development environments respectively Install jdk1.7.0 _ 60 and scala2.10.4 on the development machine, and configure related environment variables. There are a lot of online materials and the installation

High-availability LVS Based on Keepalived dual-Master Model Background: Keepalived: the purpose of Keepalived is to check the status of the web server. If a web server crashes or a job fails, Keepalived will detect it, and remove the faulty web

Overview of Spark cluster mode This article briefly reviews how Spark runs on clusters to make the components easier to understand.Components Spark applications run in a collection of independent processes on the cluster and are adjusted using the

Build Hadoop2.6.0 + Eclipse development and debugging environment In the previous article, Hadoop2.6.0 pseudo-distributed environment was built under the Win7 Virtual Machine (SEE ). For ease of Development and debugging, this article describes how