Linux installation Oracle jdk1.8 (UBUTU)

Environment:

Ubuntu 18.04 LTS x64 bit

System User Hou

Tools:

Jdk-8u171-linux-x64.tar.gz

The heart of the experiment

Steps:

• The first step:

To see if the JDK is installed, press and hold ctr+alt+t to open the command window input java-version

No JDK pops up with the following hint:

[email protected]:~$ java-version

Command ' Java ' not found, but can is installed with:

sudo apt install default-jre
sudo apt install openjdk-11-jre-headless
sudo apt install openjdk-8-jre-headless

Download the Linux version (version tar.gz) JDK to Oracle official website

Move the file jdk-8u65-linux-x64.gz to/home/hou/java, and unzip:

TAR-XZVF jdk-8u171-linux-x64.tar.gz

Create folder Java(I'll put it in the/home/hou/directory where I see it):

Mkdir/home/hou/java

Delete Compressed Package input instruction RM jdk-8u171-linux-x64.tar.gz

[Email protected]:~/java$

• Step Two:

Configure environment variables, you can add to all users ' global environment variables under /etc/profile , or you can add Java environment variables for the current user environment variable ~/.BASHRC . Because I use the Ubutu attempt to modify Vi/etc/profile, the profile file is read-only without write permission, I am too lazy to add write permission to the Java environment variable added in the current user's ~/.BASHRC
Open ~/.BASHRC and edit

[email protected]:~/java$ $sudo gedit ~/.BASHRC

Add the following code at the end, note: There are no spaces at the end of the line, and spaces are resolved as paths and errors occur.

#set Java environmentexport java_home=/home/hou/java/jdk1.8. 0_171export jre_home= $JAVA _home/ jreexport CLASSPATH=.: $JAVA _home/lib: $JRE _home/lib: $CLASSPATHexport PATH= $JAVA _home/bin:$ Jre_home/bin: $PATH

As shown, make the environment variable effective immediately after saving

[email protected]:~/java$ Source ~/.BASHRC

• Step Three:

Verify that the installation is successful

[email protected]:/$ java-version"1.8.0_171" java (TM) SE Runtime Environment (build 1.8.0_171-B11) Java HotSpot (TM) 64-bit Server VM (build 25.171-b11, mixed mode)

Summarize:

Linux installation Oracle jdk1.8 (UBUTU)