How to fix composer error upgrade version 2.2 - Command "self-update" is not defined in ubuntu18.04

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Ambar Hasbiyatmoko
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Published on ● Video Link: https://www.youtube.com/watch?v=151gfiAuXCk


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i'm trying to upgrade composer from version 1 to 2 with this script:
composer self-update --2



But got an error like this:
Command "self-update" is not defined.


This video will explains how to fix that error.



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Tags:
composer
upgrade
php
ubuntu
terminal
script
linux
install
error