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Update-alternatives command 1. Functions
Update-alternatives is a dpkg utility used to maintain symbolic links of system commands to determine which commands are used by default.
In the Debian system, we may install many similar programs and optional configurations at the same time, such as the web browser program (Firefox, Konqueror), Window Manager (wmaker, metacity) different theme from that of the mo
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/
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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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
update-alternatives--Management soft Connect/Word linked (Symbolic links)
Command format
update-alternatives [Options] Command
Detailed description
Update-alternatives can be created, deleted, repaired, soft-connected, and can display information about existing soft links, all of which constitute the Debian alternative system (
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
Ubuntu update-alternatives (soft connection management), ubuntualternatives
Update-alternatives-manage soft connections/character links (symbolic links)
Command Format
Update-alternatives [options] command
Detailed description
Update-alternatives can be used to create, delete, repair, and soft connections. It c
Alternatives is a powerful command under Linux. Can only be performed under root permissions. If there are several commands in the system that are very similar, but cannot be deleted at will, then you can use alternatives to specify a global setting.
Alternatives is often used to install multiple versions of the same software in the same system. For example, in
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
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-
Update-alternatives is a tool dedicated to maintaining the system command link in the Ubuntu system, which makes it easy to set which command the system uses by default, which software version , for example, we install both open jdk and sun in the system JDK two versions, and we want the system to use the sun JDK by default, what to do? Through the update-alternatives can be very convenient to achieve.sudo
Alternatives is a powerful command under Linux. Can only be performed under root authority. If there are several command functions in the system that are very similar, but can not be arbitrarily deleted, then use alternatives to specify a global setting.Alternatives is commonly used to install multiple versions of the same software on the same system. For example, in order to develop the need, I need to ins
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
Update-alternatives is a tool dedicated to maintaining the system command link in the Ubuntu system, which makes it easy to set which command the system uses by default, which software version, for example, we have both open jdk and Sun JDK Two versions installed in the system. And we want the system to use the sun JDK by default, what should we do? Through the update-alternatives can be very convenient to
http://persevere.iteye.com/blog/1479524Update-alternatives is a tool dedicated to maintaining the system command link in the Ubuntu system, which makes it easy to set which command the system uses by default, which software version, for example, we have both open jdk and Sun JDK Two versions installed in the system. And we want the system to use the sun JDK by default, what should we do? Through the update-alterna
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
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
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