CentOS 7 Installation configuration JDK

1. Setting up an FTP server

We install VSFTPD server on CentOS, VSFTPD Server installation and configuration reference: CentOS open FTP and configure users, install Leapftp client in Windows, through leapftp to VSFTPD server upload resources, The default is stored under the/var/ftp/pub path of CentOS.

2. Turn on the SSH service

The CentOS SSH service is turned off by default, with the service sshd start command to open the CentOS SSH services, install the Putty client in Windows, This allows the CentOS system to be remotely controlled on Windows via putty.

3. Installing the JDK

Enter the command cd/var/ftp/pub Enter the pub directory, enter the command LS display all the files under the pub, the resource default is not execute permission, so we need to enter chmod +x jdk-8u45-linux-x64.rpm gives execute permission to the resource, enters the ls command again, and if the target resource is green, proves to have execute permission.

Execute the rpm-ivh jdk-8u45-linux-x64.rpm command to install the JDK, the default installation path is/usr/java/java1.8.0_45, in order to facilitate later configuration, you can rename the file, Input command mv /usr/java/java1.8.0_45 /usr/java/java1.8 rename java1.8.0_45 to java1.8.

4. Configuring the JDK environment variables

Input command vi/etc/profile, VI is the default command mode, enter the command I will enter the editing mode. Add the following at the end of the profile:

Java_home=/usr/java/jdk1.8path= $JAVA _home/bin: $PATHCLASSPATH =.: $JAVA _home/lib/dt.jar: $JAVA _home/lib/ Tools.jarexport Java_homeexport Pathexport CLASSPATH

Press ESC when the edit is complete, and then enter : x to save the exit.

5. Test the JDK

Entering the command javac-version, showing the Java version proves that the configuration was successful.

CentOS 7 Installation configuration JDK