Android: Facebook SDK “Invalid Key Hash” on Ubuntu


I kept getting a different Facebook key hash from the one being actually generated by my debug app when it runs. Turns out I’ve been entering the wrong keystore password.

To get your key hash for Facebook SDK on Ubuntu, run the following command:

In case you don’t have the keytool program yet, you’ll see the following message:

The program ‘keytool’ can be found in the following packages:
* gcj-5-jre-headless
* openjdk-8-jre-headless
* gcj-4.8-jre-headless
* gcj-4.9-jre-headless
* openjdk-9-jre-headless
Try: sudo apt install

What I did was install openjdk-9-jre-headless by running the command:

Wait for your selected program to install and try the first command again to generate key hash for Facebook on Ubuntu.

When prompted for keystore password, try to use “android”.

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Catzie

A Filipino programmer with a variety of interests such as baking, singing, making up silly song/rap lyrics, K-pop, drawing, creating unique dessert flavors, obsessing about finding out how some things works, board games, anime, video games, and forgetting things that usually go in her long list of interests. Running small-time online dessert shops Cookies PH and Catzie's Cakery.

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