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Referring to Ask Ubuntu question How to set JAVA_HOME for OpenJDK?,
How to install Open JDK (Java developement kit) in Ubuntu (Linux)?
Open Terminal from Application Dash or press Ctrl+Alt+T
Update repository:
sudo add-apt-repository ppa:openjdk-r/ppa # only Ubuntu 17.4 and earlier sudo apt updateOptional: To search available distributions of
openjdk, use the following command:apt search openjdkInstall the appropriate version with the following command:
sudo apt install openjdk-8-jdk sudo apt install openjdk-8-source #this is optional, the jdk source codeFor
JAVA_HOME(Environment Variable) type command as shown below, in "Terminal" using your installation path...export JAVA_HOME=/usr/lib/jvm/java-8-openjdk(Note:
/usr/lib/jvm/java-8-openjdkis symbolically used here just for demostration. You should use your path as per your installation.)For
PATH(Environment Variable) type command as shown below, inTerminal:export PATH=$PATH:$JAVA_HOME/binTo check your installation:
java -version
The following used to work before the Oracle Java license changes in early 2019.
sudo add-apt-repository ppa:webupd8team/java
sudo apt-get update
sudo apt-get install oracle-java7-installer
The PPA is discontinued, until the author finds a workaround for the license issues.
Can you please check the md5sum of the downloaded file against these values here: http://www.oracle.com/technetwork/java/javase/downloads/java-se-binaries-checksum-1956892.html ?
If the md5sum does not check, it must be a broken download.
A short answer: try downloading and installing again.
A longer answer: Even though you are getting this, the jdk is getting installed. Sort of. This seems to be an error in the packaging but it is not fatal. Here is the output from my machine. In the example I cat'd the release file so you can see what CentOS I'm using and did an md5sum on the rpm I'm using. You'll notice that it doesn't match the md5sum from the Oracle site link (provided above by Kristof).
Next, I did an ls on the target directory for the jdk /usr/java/ so you can see that it is empty. Then ran the rpm install and did another ls to show that some files are there.
Of course, this defeats the purpose of using rpm, because the install information is not going to go into the rpm database. If I query the database it doesn't come up and it's missing the links that usually get installed pointing to 'latest' and 'default'
So I took a guess that maybe there is a mirror that might have a bad rpm and went to the Oracle site and downloaded the file again. I gave it a different name so that I can compare the two files. This time it was successful.
In the screen shot below you can see the two files. The newest download being the one I called jdk-7u51-linux-x86_64.rpm. You can see the md5sum shows the files are different, but on the new file, the md5 matches the Oracle site. I removed the directory that was created by the failed install and then ran the rpm -ivh command and it completed successfully. The ls on the /usr/java directory shows all the correct stuff and querying the rpm database shows it was installed. Hope this helps!
The RPM is okay.
IMHO have you checked the access rights to the path contining libjvm.so? Is it r-x for the current user?
Also can you try not mixing "-L" and "-l" switches (have all -L before any -l in your link command) 'cause gcc seems not to appreciate this mixing very much.
Since ultimately, it's an rpm you are installing, you can relocate the contents of the rpm wherever you want.
List the contents of the RPM: rpm -qpl jdk-6u21-linux-amd64.rpm, then for each base directory (/etc, /usr, \etc, \etc) you use a relocation statement. Say the RPM contains files in /etc and /usr/sbin, then to relocate /usr/sbin to /usr/local/sbin you would use rpm -i --relocate /usr/sbin=/usr/local/sbin jdk-6u21-linux-amd64.rpm.