SHELL

composer install

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === '756890a4488ce9024fc62c56153228907f1545c228516cbf63f885e036d37e9a59d27d63f46af1d4d07ee0f76181c7d3') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"

#move composer.phar, so you can call composer command
sudo mv composer.phar /usr/local/bin/composer

#update composer to latest version
composer self-update

composer install

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
# php -r "if (hash_file('sha384', 'composer-setup.php') === '55ce33d7678c5a611085589f1f3ddf8b3c52d662cd01d4ba75c0ee0459970c2200a51f492d557530c71c15d8dba01eae') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
sudo php composer-setup.php --install-dir=/bin --filename=composer
php -r "unlink('composer-setup.php');"

install composer

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === '795f976fe0ebd8b75f26a6dd68f78fd3453ce79f32ecb33e7fd087d39bfeb978342fb73ac986cd4f54edd0dc902601dc') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"

download composer

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === 'e0012edf3e80b6978849f5eff0d4b4e4c79ff1609dd1e613307e16318854d24ae64f26d17af3ef0bf7cfb710ca74755a') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"

install composer

sudo apt install composer

composer for windows

Composer for Windows

https://getcomposer.org/Composer-Setup.exe

composer install

php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
php -r "if (hash_file('sha384', 'composer-setup.php') === '756890a4488ce9024fc62c56153228907f1545c228516cbf63f885e036d37e9a59d27d63f46af1d4d07ee0f76181c7d3') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
php composer-setup.php
php -r "unlink('composer-setup.php');"

windows install composer

Just to download
https://getcomposer.org/download/

Install composer

//Update your packages:
sudo apt-get update

//Install Curl to get the composer library:
sudo apt-get install curl

//Installing composer:
sudo curl -s https://getcomposer.org/installer | php

//Move the composer file to bin path :
sudo mv composer.phar /usr/local/bin/composer

//Verify composer installation :
composer

where do you install composer

// Adding permissions after installing Composer on Mac OSX
sudo chmod 755 /usr/local/bin/composer.phar

install composer

Purge existing composer v1

sudo apt purge composer

Download composer-setup v2

curl -sS https://getcomposer.org/installer -o composer-setup.php

Use php to install Composer
sudo php composer-setup.php --install-dir=/usr/local/bin --filename=composer

Check Composer Version
composer -V

composer download

Composer Linux Mint 19.3