Scala installation Configuration

Background Notes

Recent research spark need Scala to prepare a Scala environment for documenting the configuration notes.
The Scala language is based on the Java language, so you have to install the JDK first. Experimental Environment: Win7 under VMware Virtual machine operating system: CentOS 6.5 x64 java:jdk-8u161-linux-x64.tar.gz scala:scala-2.12.4.tgz Installation configuration 1. Install JDK

In general, we will have to uninstall the Linux openjdk, and then install the Sun's JDK.
Since my CentOS is installed in the mini version, I can install it directly without having my own JDK.
Download JDK installation package from Oracle website:
http://download.oracle.com/otn-pub/java/jdk/8u161-b12/2f38c3b165be4555a1fa6e98c45e0808/ Jdk-8u161-linux-x64.tar.gz? Authparam=1517808422_bdd9ddc0a30c84fe1961a9a2f6f1eb63
I downloaded the latest version of JDK8: jdk-8u161-linux-x64.tar.gz
The following is the configuration step for the JDK.
Create a directory/java in the/usr directory,

CD/USR
mkdir Java

Upload the JDK installation package to the/usr/java directory, unzip the JDK installation package,

TAR-ZXVF jdk-8u161-linux-x64.tar.gz

Configure Environment variables

Vim/etc/profile

Add the following configuration entry in/etc/profile

java_home=/usr/java/jdk1.8.0_161
path= $JAVA _home/bin: $PATH
classpath=.: $JAVA _home/lib/dt.jar: $JAVA _ Home/lib/tools.jar

Refresh environment variable to make configuration take effect immediately

Source/etc/profile

Check that the JDK is configured successfully

Java-version

2. Install Scala

First go to the official website to download Scala installation package, download address: http://www.scala-lang.org/download/
The latest version we downloaded: scala-2.12.4.tgz
Here is the Scala configuration step.
Create a directory/scala in the/usr directory,

Mkdir/usr/scala

Upload the Scala installation package to the/usr/scala directory and unzip the Scala installation package.

TAR-ZXVF scala-2.12.4.tgz

Configure Environment variables

Vim/etc/profile

Add the following configuration entry in/etc/profile

scala_home=/usr/scala/scala-2.12.4
path= $PATH: $SCALA _home/bin

Refresh environment variable to make configuration take effect immediately

Source/etc/profile

Check that scala configuration is in effect.

Scala-version