Composer - установка 2.x версии на Ubuntu 20.04

Алгоритм установки composer 2.x на ОС Ubuntu 20.04 (протестировано 02.01.2023):

# curl -sS https://getcomposer.org/installer -o /tmp/composer-setup.php
# HASH=`curl -sS https://composer.github.io/installer.sig`
# php -r "if (hash_file('SHA384', '/tmp/composer-setup.php') === '$HASH') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
# php /tmp/composer-setup.php --install-dir=/usr/local/bin --filename=composer

Проверяем версию composer 2.x:

# /usr/local/bin/composer -V
Composer version 2.5.1 2022-12-22 15:33:54