Where do I find the JDK install to uninstall? @terdon had explained using an rpm type download so it would be easier to uninstall, but I cannot find it.
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4 Answers
What's that packages name?
When you don't know the name of a specific RPM to uninstall you can search for it like so using the command rpm.
$ rpm -aq | grep -i jdk java-1.7.0-openjdk-devel-1.7.0.60-2.4.4.0.fc19.x86_64 jdk-1.7.0_45-fcs.x86_64 java-1.7.0-openjdk-1.7.0.60-2.4.4.0.fc19.x86_64 Based on the above output I have 2 versions of Java installed. The official Oracler version, jdk-1.7.0_45 and the IceTea version aka. Open JDK, java-1.7.0-openjdk-1.7.0.60-2.4.4.0.
Uninstalling
To uninstall the official version of Java (JDK) you could use the following commands, yum or rpm:
yum
$ sudo yum remove jdk [sudo] password for saml: Loaded plugins: auto-update-debuginfo, changelog, langpacks, refresh-packagekit Resolving Dependencies --> Running transaction check ---> Package jdk.x86_64 2000:1.7.0_45-fcs will be erased --> Finished Dependency Resolution Dependencies Resolved ===================================================================================================================== Package Arch Version Repository Size ===================================================================================================================== Removing: jdk x86_64 2000:1.7.0_45-fcs installed 193 M Transaction Summary ===================================================================================================================== Remove 1 Package Installed size: 193 M ... rpm
$ sudo rpm -e jdk I would recommend always trying to use yum if you can, it does dependency checks that rpm does not.
- I can't wget download.oracle.com/otn-pub/java/jdk/7u51-b13/…cea– cea2014-01-23 04:30:16 +00:00Commented Jan 23, 2014 at 4:30
- Yes you have to go in through their website and download the files via your browser. Then use
scpto copy them to other servers that are headless.2014-01-23 04:31:21 +00:00Commented Jan 23, 2014 at 4:31
Search pre-installed JAVA:
$ rpm -qa | grep java javapackages-tools-3.4.1-11.el7.noarch java-1.8.0-openjdk-headless-1.8.0.151-5.b12.el7_4.x86_64 Remove using following command:
rpm -e java-1.8.0-openjdk-headless-1.8.0.151-5.b12.el7_4.x86_64 rpm -e javapackages-tools-3.4.1-11.el7.noarch 
yum remove java
It is working for me
- 1Removing "java" is broader than removing a single "JDK"...2018-04-20 15:04:24 +00:00Commented Apr 20, 2018 at 15:04
-> rpm -qa | grep java java-1.8.0-openjdk-1.8.0.312.b02-0.1.ea.el8.x86_64 tzdata-java-2021b-1.el8.noarch javapackages-filesystem-5.3.0-1.module_el8.0.0+11+5b8c10bd.noarch java-1.8.0-openjdk-headless-1.8.0.312.b02-0.1.ea.el8.x86_64
-> sudo yum remove jna-4.5.1-5.el8.x86_64 java-1.8.0-openjdk-headless-1:1.8.0.312.b02-0.1.ea.el8.x86_64
- Welcome to the site, and thank you for your contribution. Please note that brevity is acceptable, but fuller explanations are better. Currently, it is extremely difficult to understand how your answer relates to the original problem; please consider expanding it.AdminBee– AdminBee2021-10-26 08:39:10 +00:00Commented Oct 26, 2021 at 8:39