Linux

System Requirements: Open JDK 8 must be installedYou can use the following command to view the system Java environment1 grep GCJ1. Download the JDK and installOfficial website: http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-21

Display time is a common command, and it is often used in writing shell scripts to display date-related file names or times. The date command is both Linux and Windows.The use of the date command under Linux Date [OPTION] ... [+format]

First, check the installation path of the JDK:Whereis JavaWhich Java (Java execution path)Echo $JAVA _homeEcho $PATHSecond, uninstall the old version of the JDK:1. Determine the version of the JDK:Rpm-qa | grep JDKRpm-qa | grep GCJThe possible

===================== deploying SVN ===================== on Linux2017-09-29 14:54:12Personal original, reproduced please specify, otherwise investigate legal liabilityLinux server-side installation configuration:.....................................

Similar to the Windows installation of various applications, it is possible to install a variety of applications, often referred to as software packages, under Linux. At present, the common package format in Linux system mainly include: RPM package,

Title's three fields are explained below the man top, but they are somewhat ambiguous, and it is difficult to understand how they are specific to the resource usage of the process. After reviewing the information, summarize.VIRT: 1. The

The first is the installation, I refer to this http://blog.csdn.net/xinghun_4/article/details/47860645I'm CentOS, using YumYum install python-devel libjpeg libjpeg-devel freetype freetype-devel zlib zlib-devel littlecms littlecms-devel libwebp L

First, the FTP Active Passive mode introductionBefore you begin, you need to understand what the control plane is and what the data plane is. The control plane is the connection established before the data transfer, such as the TCP three handshake

Cut is a selection command that analyzes a piece of data and takes out what we want. In general, the selection of information is usually for "line" for analysis, not the entire information analysisCut [-bn] [file] or cut [-c] [file] or cut [-DF]

When the default installation is complete and you do not know the root user's password, how do I apply root permissions? (1) Sudo command This allows you to enter the current administrator user password to get superuser privileges. However, by

no Internet access!!! Can't bear it. Phenomenon: Ifconfig No hair, want to find the IP can not be found. Ifconfig–a You can list all the network card devices, confirm that the VM VirtualBox NIC is on the right, has been given to the virtual

article source: http://www.cnblogs.com/mrcln/p/6179673.html1. Switch to the root user2. Check if VSFTP is installed, I have installed this.[Email protected] vsftpd]# Rpm-qa | grep vsftpdvsftpd-3.0. 2-11.el7_2.x86_64 3. If not found,

Tag: Service return activity produces STR output file system report htmObjectiveWhat is performance optimization? Personally, performance optimization is intended to improve application or system capabilities. So how can you achieve tuning your

Operation and maintenance engineer is from a stick into the bitter force into the process of growth, the premise is that you can endure can fight, but also have a keen sense of smell in front of the trend changes. such as: Big Data this year,

The terminal in Linux is very convenient and can be copied and pasted directly.Then open a gedit text editor, paste the contents of the copy can be.Unlike the Windows CMD console, you need to first right-click the title bar, select Edit-All

for the network security has been our goal, large to the enterprise database security, small to personal account security, so we all need password (that is, password). In daily life and production, for, QQ, we can get back through the mobile phone

One: pageCtrl+u up half a pageCtrl+f up one pageCtrl+d down Half pageCtrl+b down one pageTwo: Move cursor command0: Cursor moves to the beginning of the current line$: Cursor moves to the end of the current lineThree: Common INSERT, delete

Su:swith User switch users, switch to root userCat:concatenate SeriesUname:unix Name Name SystemDf:disk free HDDDu:disk Usage HDD UsageChown:change owner Change OwnersChgrp:change Group change user groupsPs:process Status Process stateTar:tape

1. What is Linux?Linux is a free-to-use and free-to-propagate Unix-like operating system, a POSIX and Unix-based multiuser, multitasking, multi-threaded and multi-CPU operating system. It can run major UNIX tools software, applications, and network

Day1_17-9-3,I. Application Exercises 1. Requirement exercises Write login interface Requirements: Ask the user to enter the user name and password Welcome information displayed after successful authentication Enter an error three times and exit