composer in the first installation worked perfectly, but when you install it to update php to 7.2. * I get the following error
'All settings correct for using Composer
Unable to write keys.dev.pub to: /home/alfredo/.composer
Asposer install it with the following command curl -sS https://getcomposer.org/installer | php when you install it just delete the file composer as such, in the first installation it worked perfectly
some help please thank them
For that you must follow these simple steps I used it in Unbutu 16.04.
First, update the package manager cache by running:
sudo apt-get update
Now, let's install the dependencies. We will need curl to download Composer and php-cli to install and execute it. The php-mbstring package is necessary to provide functions for a library that we are going to use. git is used by Composer to download project dependencies and decompress to extract compressed packages. Everything can be installed with the following command:
sudo apt-get install curl php-cli php-mbstring git unzip
then you install it with the curl in this way:
curl -sS https://getcomposer.org/installer -o composer-setup.php
Next, run a short PHP script to verify that the installer matches the SHA-384 hash for the last installer found on the Composer Public Keys / Signatures page. You should make sure to replace the last hash value with the value highlighted below:
php -r "if (hash_file('SHA384', 'composer-setup.php') === '669656bab3166a7aff8a7506b8cb2d1c292f042046c5a994c43155c0be6190fa0355160742ab2e1c88d40d5be660b410') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
To install composer globally, use the following:
sudo php composer-setup.php --install-dir=/usr/local/bin --filename=composer
This will download and install Composer as a system-wide called composer , in / usr / local / bin.
All settings correct for using Composer
Downloading 1.1.1 ...
Composer successfully installed to: / usr / local / bin / composer Use it: php / usr / local / bin / composer
and now you can try it with this command:
composer
I should show you something like this:
Output
______
/ ____/___ ____ ___ ____ ____ ________ _____
/ / / __ \/ __ '__ \/ __ \/ __ \/ ___/ _ \/ ___/
/ /___/ /_/ / / / / / / /_/ / /_/ (__ ) __/ /
\____/\____/_/ /_/ /_/ .___/\____/____/\___/_/
/_/
Composer version 1.1.1 2016-05-17 12:25:44
Usage:
command [options] [arguments]
Options:
-h, --help Display this help message
-q, --quiet Do not output any message
-V, --version Display this application version
--ansi Force ANSI output
--no-ansi Disable ANSI output
-n, --no-interaction Do not ask any interactive question
--profile Display timing and memory usage information
--no-plugins Whether to disable plugins.
. . .