Why is apt unable to locate openjdk package on Ubuntu 20.04?

Question

I am attempting to install OpenJDK on my headless server running Ubuntu 20.04. I've done this before on older versions of Ubuntu, but as it had been a while since then, I couldn't remember the package name. I put in the java command so that I could find the correct package name, and I received this:

Command 'java' not found, but can be installed with:

sudo apt install default-jre              # version 2:1.11-72, or
sudo apt install openjdk-11-jre-headless  # version 11.0.7+10-3ubuntu1
sudo apt install openjdk-8-jre-headless   # version 8u252-b09-1ubuntu1

I wanted OpenJDK 8, so I put in sudo apt install openjdk-8-jre-headless and hit enter, expecting it to be installed. Instead, I received this:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package openjdk-8-headless

I don't understand why the package can't be located. I've done everything I can think of, and I can't seem to find anyone else having this problem, so any help would be greatly appreciated. Thanks for your time!

Alvin Liang is correct; https://packages.ubuntu.com/search?suite=focal&searchon=names&keywords=openjdk shows it's there & available once 'universe' is enabled (it's community sourced packages so is not enabled by default on Ubuntu; Ubuntu only comes with 5 year supported packages until you enable other package streams that usually have shorter lives). https://help.ubuntu.com/community/Repositories/Ubuntu — guiverc, Apr 30 '20 at 03:59
Does this answer your question? How do I enable the "Universe" repository? — user535733, Apr 30 '20 at 04:07
I actually already have the Universe repository enabled. It still can't find the package, which is why I'm stumped. — Batchicken, Apr 30 '20 at 11:03

score 5 · Answer 1 · answered Jul 31 '20 at 15:10

5

You made a typo: the error message says that it can't find openjdk-8-headless.

But the correct package name is openjdk-8-jre-headless. It is available and installs without any issues on 20.04.

answered Jul 31 '20 at 15:10

Pilot6

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Why is apt unable to locate openjdk package on Ubuntu 20.04?

1 Answers1