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By default, even with Java 1.6 version Java script jdk-6u31-linux-i586.bin, when Java is installed, it will automatically upgrade to a 1.7 version state. For some applications that need to be run based on version 1.6, a downgrade of 1.6 is required. There are two specific ways to do this:1. Use the alternatives command to implement.Alternatives is a powerful command under Linux, and can only be executed under root authority. If there are several comma
Update-alternatives is a script for switching between multiple commands of the same type and can be installed in Debian via the Apt-get install dpkg. Before explaining the details of Update-alternatives, let's take a look at the examples already in the system. Open the terminal and execute the following command:LsResults: lrwxrwxrwx 1 root root 2011-03-12 15:20/usr/bin/java-/etc/
Since the development of Linux, there have been a lot of available software. In this way, some software functions are basically the same. For example, there are nvi, Vim, emacs, and nano in the editor. What I'm talking about is only part of it. In most cases, software with similar functions is installed in the system at the same time and can be executed using their names. For example, to execute vim, you only need to input Vim in the terminal and press Enter. However, in some cases, we need to u
Use alternatives to convert the java version-general Linux technology-Linux programming and kernel information. The following is a detailed description. After jdk was installed, java and javac were replaced with the java and javac of gij in/usr/bin.
Some people on the Internet said that they could use a tool named alternativs to migrate the software version in linux. They decided to use alternatives to mig
Tian haili @ csdn
Different Android platforms use different JDK versions during compilation. For example, froyo (2.2) and its earlier versions require JDK; gingerbread and later versions require JDK. If you want to build different platform projects in an environment, you need to install different JDK. It takes time and effort to install JDK repeatedly during project switching. Update-alternatives provides a solution for this situation.
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Article 35: Consider alternatives other than the virtual function
Article 35 consider alternatives other than the virtual function
Realizing template method mode by Non-virtual interface technique
Implementing strategy mode with function pointers
Complete strategy mode with Tr1function
The classical strategy model
Summary
Virtual func
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I typed:sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/ jdk1.8.0/bin/java" 1It ' s says alternatives--install needs link name path priorityCommand-Line Edubuntu
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Edited Jul 5 ' + at 17:48 Guntbert4,344
Asked Jul 5 ' + at 16:22 Swapnil18
View the location of the Java commandFind the soft link location for/etc/alternatives/javaIt allows us to see all the optional commands for a command. Execute code:There are two types of alternative: automatic and manual. The initial state of each alternative is automatic, and if the system discovers that the administrator has manually modified a alternative, its status is automatically changed to manualView the current Java versionMy JDK is in this f
Previously, the jdk of ubuntu was installed with the apt-get install command. The default installation is openjdk, and the path is/usr/lib/jvm /. If you need to switch or upgrade the java version, you can use update-alternatives. Of course, you can uninstall and reinstall it, or you can install it by setting environment variables. This section describes how to install update-alternatives.Since the development of Linux, there have been a lot of availab
Personal blog Address: http://www.cnblogs.com/wdfwolf3/Update-alternatives is a command that Ubuntu systems use for software version switching. For example, there are several versions of the JDK in the system that map the directories of these commands to a system directory as a link, then manage them through update-alternatives and set the default startup version. With update-
In the past two days, I wanted to develop the android development environment in Linux, But I encountered a big problem when installing Sun's Java 6.
The source cannot be found.
The final installation method is to download the binfile of Java 6 on the official website, modify the/etc/profile file, and specify the location of Java, so that the Java command is available.
Then you need a command to specify which software the Java command is provided, that is, the default software. The reason for th
As the saying goes, same. Just as former independent software developers (independent Software VENDOR,ISV) have extended the software portfolio from a single product to an integration suite in an effort to gain a stronger market position, today's software is the service (software-as-a-service, SaaS) Vendors are also leveraging a range of new SaaS platforms to launch the same strategy.
As more and more organizations are willing to adopt SaaS alternatives
Use the update-alternatives command in Linux, updatealternatives
Personal blog address: http://www.cnblogs.com/wdfwolf3/
Update-alternatives is a command used by the ubuntu system to switch the software version. For example, if there are several jdk versions in the system, map the directories where these commands are located to a unified system directory as links, and then manage them through update-
This blog post lists 5 tools that can replace putty, some of which do not implement putty. As follows:PuTTy is the most popular SSH clients for windows-based systems. It's very small is size and easy to use. Most of the people in the Linux world prefer to use putty. But they is aware that there is many tools available to provides many features which Putty doesn ' t has. I have used many SSH clients and adding 5 alternatives of PuTTY client below which
Install JDK 6 first
Sudo apt-Get install sun-java6-jdk
Then you need to set the default JavaProgramSudo Update-alternatives -- config JavaEnter the corresponding options as prompted, and set them to JDK 6.
The following settingsSudo Vim/etc/environment
Add the following two lines:Classpath =/usr/lib/JVM/Java-6-sun/libJava_home =/usr/lib/JVM/Java-6-sunIf classpath and java_home are already set, change them to the above format and press ZZ
On June 18, MarkShuttleworth met with the chairman of the China OSS Promotion alliance and said: "Ubuntu is not a DOS alternative ". What does this sentence mean? Let's ask, what is Mark's purpose in China this time? The fact is that Mark's visit to China was not designed to visit the OSS alliance, but to negotiate with the Ubuntu OEM (I will not talk about it here. Only in this context can we correctly understand the exact meaning of "Ubuntu does not use DOS
February 15 message: Today, Red Hat officially announced the official launch of Red Hat Enterprise Virtualization 3.0. This product greatly expands its strength in server and desktop virtualization management tools and kernel-based Virtual Machine management programs. According to RedHat, RedHat Enterprise Virtualization 3.0 balances the virtualization management features, performance, and scalability of new enterprises under Linux and Windows loads, and the cost is much lower than that of propr
When more than one Java is installed in a Linux system, we can switch the Java version automatically when the original configuration file is not modified:[Email protected] ~]# update-alternatives--config java650) this.width=650; "title=" 3118.tmp.jpg "style=" height:160px;width:737px "src=" http://s4.51cto.com/wyfs02/M00/ 89/20/wkiom1gicoew4dxbaaau_kx0tym965.jpg "width=" 881 "height=" 156 "alt=" Wkiom1gicoew4dxbaaau_kx0tym965.jpg "/>To maintain the cu
As a developer, when developed on Windows, it uses artifacts such as total Commander, search directories, view files, batch rename, and more.TC is a paid version, there is a free alternative version just manager:http://www.justmanager.ru/downloads/Prior to working at Altium, a large number of Ukrainian programmers liked to use far Manager, full of the C/borland C + + in the University of C + + when the sense of vision. Download here: https://farmanager.com/download.php?l=enenjoy!Windows Develope
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