[Linux] How to install Composer in CentOS 8 

We need PHP and sudo permission to do that. This is faster flow for installing composer.

# to install php cli and zip:
sudo dnf install php-cli php-json php-zip curl unzip

# using curl to get install and install it by using php
curl -sS https://getcomposer.org/installer |php

# move composer into your target
sudo mv composer.phar /usr/local/bin/composer

And the general flow here.

# To install php cli and other source
sudo dnf install php-cli php-json php-zip wget unzip

# Download composer-setup file
php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"

# The following wget command will download the latest Composer signature from Composer’s Github page, and then store it as a variable named HASH.
HASH="$(wget -q -O - https://composer.github.io/installer.sig)"

# To verify whether the installation script is damaged, run the following command
php -r "if (hash_file('SHA384', 'composer-setup.php') === '$HASH') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"

# Verified result
Installer verified

# Move the installed composer to your target
sudo php composer-setup.php --install-dir=/usr/local/bin --filename=composer

# Check composer version
composer -V
Composer version 1.10.1 2020-03-13 20:34:27