After composer installation , please follow below steps:

Open your shell configuration file: Open the shell configuration file (~/.bashrc, ~/.bash_profile, or ~/.profile) in a text editor. For example:

nano ~/.bashrc

add the Composer’s binary directory to your PATH as well:

export PATH="$HOME/.config/composer/vendor/bin:$PATH"

This allows you to run Composer globally for your user account.

Save and Close the File: Save the changes you made to the file and close the text editor.

Apply the Changes: Apply the changes to your current shell session by running:

source ~/.bashrc

Verify: You can now verify that Composer is installed and available by running:

composer --version