Eu não uso o CentOS, mas olhando para a saída, eu acho que você precisa instalar o Java 1.7 JRE (ambiente de tempo de execução). Depois de instalar o JRE, você poderá executar alternatives para alterar o executável Java padrão, de 1.6 para 1.7.
A versão java no servidor era 1.6.0_37, usei o yum install java-1.7.0-openjdk para instalar o Java-1.7 mas depois de usar este comando quando usei java -version a versão do Java ainda é 1.6.0 . Como mudar para 1,7?
# yum install java-1.7.0-openjdk
java -version
java version "1.6.0_37"
Java(TM) SE Runtime Environment (build 1.6.0_37-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.12-b01, mixed mode)
Eu também segui as etapas a seguir, mas a versão do java ainda é 1.6.0_37
Downloading Latest Java Archive
Java latest archive is available on its official site. We recommend to download latest version of Java from Oracle official website.
For 64 Bit:-
# cd /opt/
# wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/7u75-b13/jdk-7u75-linux-x64.tar.gz"
For 32 Bit:-
# cd /opt/
# wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/7u75-b13/jdk-7u75-linux-i586.tar.gz"
Note: In any case if above command failed to download and you need to download java through Linux terminal, watch below screen cast ( http://screencast.com/t/wf9bQ0XjDPxT ), You are required a graphical browser.
After completing download, Extract archive using following command. Use archive file as per your system configuration. For this example we are using CentOS 6.6 (64 bit) system.
# tar xzf jdk-7u75-linux-x64.tar.gz
Install Java with Alternatives
After extracting Java archive file, we just need to set up to use newer version of Java using alternatives. Use the following commands to do it.
# cd /opt/jdk1.7.0_75/
# alternatives --install /usr/bin/java java /opt/jdk1.7.0_75/bin/java 2
# alternatives --config java
There are 4 programs which provide 'java'.
Selection Command
-----------------------------------------------
* 1 /usr/lib/jvm/jre-1.6.0-openjdk/bin/java
+ 2 /opt/jdk1.7.0_60/bin/java
3 /opt/jdk1.7.0_72/bin/java
4 /opt/jdk1.7.0_75/bin/java
Enter to keep the current selection[+], or type selection number: 4 [Press Enter]
Now you may also required to set up javac and jar commands path using alternatives command.
# alternatives --install /usr/bin/jar jar /opt/jdk1.7.0_75/bin/jar 2
# alternatives --install /usr/bin/javac javac /opt/jdk1.7.0_75/bin/javac 2
# alternatives --set jar /opt/jdk1.7.0_75/bin/jar
# alternatives --set javac /opt/jdk1.7.0_75/bin/javac
Check Installed Java Version
Use following command to check which version of Java is currently being used by system.
# java -version
java version "1.7.0_75"
Java(TM) SE Runtime Environment (build 1.7.0_75-b13)
Java HotSpot(TM) 64-Bit Server VM (build 24.75-b04, mixed mode)
Configuring Environment Variables
Most of Java based application’s uses environment variables to work. Use following commands to set up these variable properly. It’s also good to add following commands to any start-up script like ~/.bashrc or ~/.bash_profile.
Setup JAVA_HOME Variable
# export JAVA_HOME=/opt/jdk1.7.0_75
Setup JRE_HOME Variable
# export JRE_HOME=/opt/jdk1.7.0_75/jre
Setup PATH Variable
# export PATH=$PATH:/opt/jdk1.7.0_75/bin:/opt/jdk1.7.0_75/jre/bin
Eu também usei seguindo, mas ainda mostra a versão anterior
root@server [/]# yum search java | grep -i --color JDK
ldapjdk-javadoc.x86_64 : Javadoc for ldapjdk
icedtea-web.x86_64 : Additional Java components for OpenJDK - Java browser
java-1.6.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.6.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.6.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.6.0-openjdk-javadoc.x86_64 : OpenJDK API Documentation
java-1.6.0-openjdk-src.x86_64 : OpenJDK Source Bundle
java-1.7.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.7.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.7.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.7.0-openjdk-javadoc.noarch : OpenJDK API Documentation
java-1.7.0-openjdk-src.x86_64 : OpenJDK Source Bundle
java-1.8.0-openjdk.x86_64 : OpenJDK Runtime Environment
java-1.8.0-openjdk-demo.x86_64 : OpenJDK Demos
java-1.8.0-openjdk-devel.x86_64 : OpenJDK Development Environment
java-1.8.0-openjdk-headless.x86_64 : OpenJDK Runtime Environment
java-1.8.0-openjdk-javadoc.noarch : OpenJDK API Documentation
java-1.8.0-openjdk-src.x86_64 : OpenJDK Source Bundle
ldapjdk.x86_64 : The Mozilla LDAP Java SDK
root@server [/]# yum install java-1.7.0-openjdk java-1.7.0-openjdk-devel
Loaded plugins: fastestmirror
Setting up Install Process
Loading mirror speeds from cached hostfile
* base: centos.hyve.com
* extras: centos.hyve.com
* updates: centos.hyve.com
Package 1:java-1.7.0-openjdk-1.7.0.75-2.5.4.0.el6_6.x86_64 already installed and latest version
Resolving Dependencies
--> Running transaction check
---> Package java-1.7.0-openjdk-devel.x86_64 1:1.7.0.75-2.5.4.0.el6_6 will be installed
--> Finished Dependency Resolution
Dependencies Resolved
================================================================================
Package Arch Version Repository
Size
================================================================================
Installing:
java-1.7.0-openjdk-devel x86_64 1:1.7.0.75-2.5.4.0.el6_6 updates 9.4 M
Transaction Summary
================================================================================
Install 1 Package(s)
Total download size: 9.4 M
Installed size: 36 M
Is this ok [y/N]: y
Downloading Packages:
java-1.7.0-openjdk-devel-1.7.0.75-2.5.4.0.el6_6.x86_64.r | 9.4 MB 00:03
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : 1:java-1.7.0-openjdk-devel-1.7.0.75-2.5.4.0.el6_6.x86_64 1/1
Verifying : 1:java-1.7.0-openjdk-devel-1.7.0.75-2.5.4.0.el6_6.x86_64 1/1
Installed:
java-1.7.0-openjdk-devel.x86_64 1:1.7.0.75-2.5.4.0.el6_6
Complete!
root@server [/]# ls -l /usr/lib/vim
/bin/ls: cannot access /usr/lib/vim: No such file or directory
root@server [/]# ls -l /usr/lib/jvm/
total 12
drwxr-xr-x 3 root root 4096 Feb 6 00:03 ./
drwxr-xr-x 28 root root 4096 Feb 5 22:47 ../
lrwxrwxrwx 1 root root 32 Feb 6 00:03 java-1.7.0 -> /etc/alternatives/java_sdk_1.7.0/
drwxr-xr-x 7 root root 4096 Feb 6 00:03 java-1.7.0-openjdk-1.7.0.75.x86_64/
lrwxrwxrwx 1 root root 34 Feb 6 00:03 java-1.7.0-openjdk.x86_64 -> java-1.7.0-openjdk-1.7.0.75.x86_64/
lrwxrwxrwx 1 root root 34 Feb 6 00:03 java-openjdk -> /etc/alternatives/java_sdk_openjdk/
lrwxrwxrwx 1 root root 21 Feb 5 23:52 jre -> /etc/alternatives/jre/
lrwxrwxrwx 1 root root 27 Feb 5 22:47 jre-1.7.0 -> /etc/alternatives/jre_1.7.0/
lrwxrwxrwx 1 root root 38 Feb 5 22:47 jre-1.7.0-openjdk.x86_64 -> java-1.7.0-openjdk-1.7.0.75.x86_64/jre/
lrwxrwxrwx 1 root root 29 Feb 5 22:47 jre-openjdk -> /etc/alternatives/jre_openjdk/
root@server [/]# vim .bashrc
root@server [/]# java -version
java version "1.6.0_37"
Java(TM) SE Runtime Environment (build 1.6.0_37-b06)
Java HotSpot(TM) 64-Bit Server VM (build 20.12-b01, mixed mode)
root@server [/]# cd $HOME
root@server [~]# vim .bashrc