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Example tutorial on installing jdk1.7 on CentOS 7

零下一度
零下一度Original
2017-07-17 11:17:401539browse

Check the system version

[root@zabbix ~]# cat /etc/redhat-release 
CentOS Linux release 7.1.1503 (Core) 
[root@zabbix ~]# uname -a
Linux zabbix.com 3.10.0-229.el7.x86_64 #1 SMP Fri Mar 6 11:36:42 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

1. Check whether the JDK that comes with Linux has been installed

# java -version

2 , View JDK information

# rpm -qa | grep java

Display:

java-x.x.x-gcj-compat-x.x.x.x-xxjpp.xxx

java-x.x.x-openjdk-x.x.x.x-x.x.bxx.exx

3. Uninstall (there are several uninstalls)

# rpm -e --nodeps java-x.x.x-gcj-compat- x.x.x.x-xxjpp.xxx

# rpm -e --nodeps java-x.x.x-openjdk-x.x.x.x-x.x.bxx.exx

There are some other commands

rpm - qa | grep gcj

rpm -qa | grep jdk

If the openjdk source cannot be found, you can also uninstall it like this

yum -y remove java java-x.x.x -gcj-compat-x.x.x.x-xxjpp.xxx

yum -y remove java java-x.x.x-openjdk-x.x.x.x-x.x.bxx.exx

4. Install JDK

Download Address: (JDK1.7)

http://download.oracle.com/otn-pub/java/jdk/7u79-b15/jdk-7u79-linux-x64.rpm

Place it under /usr/local/src and execute the following installation command:

# rpm -ivh jdk-7u79-linux-x64.rpm

It will be installed under /usr/java by default

5. Check whether it is installed

# java -version

Display: jvav version "1.7.0_79" ...indicates success

6. Configure environment variables

# vi /etc/profile

Add the following lines at the end:

JAVA_HOME=/usr/java/jdk1.7.0_71

CLASS_PATH= .:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

PATH=$JAVA_HOME/bin:$PATH

export JAVA_HOME CLASS_PATH PATH

# reboot Restart the machine configuration to take effect

Or execute the following command to take effect immediately

#source /etc/profile


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