Linux under JDK installation

Recently in the study of Linux, Daoteng a half-day. Finally, the JDK is installed, write a blog record, the key is the JDK environment variable configuration and save the

I used the SECURECRT to connect Linux, and then securecrt on the command, about the use of SECURECRT, and then added on the blog

The following begins the text:

First, check if there is a JDK on your Linux machine, and uninstall it if you have one.

1. Check it to

[[email protected] ~]# Rpm-qa|grep GCJ or rpm-qa|grep java
Libgcj-4.1.2-44.el5
java-1.4.2-gcj-compat-1.4.2.0-40jpp.115

2. Uninstall the JDK

[Email protected] ~]# yum-y remove java-1.4.2-gcj-compat-1.4.2.0-40jpp.115 or rpm-e--nodeps java-1.4.2-gcj-compat-1. 4.2.0-40jpp.115

Until I see the following sentence, even if it succeeds.

complete! (See this description complete.) )

3. Then download the Linux JDK

Http://www.oracle.com/technetwork/java/javase/downloads/java-se-jdk-7-download-432154.html

Two. Installing the JDK

When I download the RPM package

Then perform the installation (my JDK is placed under the Jdksource folder)

[Email protected] ~]# Cd/jdksource
[Email protected] jdksource]# RPM-IVH jdk-7u80-linux-x64.rpm

The flowers are ready to be installed without an accident.

Three. Configure environment variables (key)

#vi/etc/profile
In the profile file, add the following:
java_home=/usr/java/jdk1.7.0 (This is your own JDK path)
Jre_home=/usr/java/jdk1.7.0/jre
Path= $PATH: $JAVA _home/bin: $JRE _home/bin
Classpath=.: $JAVA _home/lib/jt.jar: $JAVA _home/lib/tools.jar: $JRE _home/lib
Export Java_home jre_home PATH CLASSPATH

Add complete save exit, this toss me for a long time:

Press ESC to enter WQ and then hit enter (Save and exit)

I can only do it this way.

Source/etc/profile, it won't work.

Four. Check if the environment variable is configured successfully

[Email protected] ~]# java-version
Java Version "1.7.0_80"
Java (TM) SE Runtime Environment (build 1.7.0_80-b15)
Java HotSpot (TM) 64-bit Server VM (build 24.80-b11, Mixed mode)

Done!

Linux under JDK installation