instalar compose G3.13.0

Hola, estoy siguiendo la instalacion de autogestión del 3.13.0 y al ejecutar composer install me tira que no conoce el comando composer. ¿Que falta? ¿solo se corre eso, o hay que tocar algo mas?, estoy en Debian 8
Saludos

Hola Rodrigo,

Fijate en este post: http://foro.comunidad.siu.edu.ar/index.php?topic=12390.

Saludos, Florencia.

Hola, tuve el mismo problema con el composer, luego seguí este post http://foro.comunidad.siu.edu.ar/index.php?topic=12390. y pude lograr que funcione el comando composer install, me pedía php 5.6 yo tenia 5.5 utilice los siguientes comandos para pasar de 5.5 a 5.6

sudo apt-get install software-properties-common -y
sudo add-apt-repository ppa:ondrej/php -y
sudo apt-get update
sudo apt-get install php5.6 -y

Pero al ejecutar de nuevo el composer install me tira los siguientes errores con las extensiones

Do not run Composer as root/super user! See https://getcomposer.org/root for details
Loading composer repositories with package information
Updating dependencies (including require-dev)         
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - The requested PHP extension ext-pgsql * is missing from your system. Install or enable PHP's pgsql extension.
  Problem 2
    - The requested PHP extension ext-gd * is missing from your system. Install or enable PHP's gd extension.
  Problem 3
    - The requested PHP extension ext-curl * is missing from your system. Install or enable PHP's curl extension.
  Problem 4
    - The requested PHP extension ext-apcu * is missing from your system. Install or enable PHP's apcu extension.
  Problem 5
    - phpoffice/phpexcel 1.8.1 requires ext-xml * -> the requested PHP extension xml is missing from your system.
    - siu/chulupi-framework v2.0.2 requires phpoffice/phpexcel 1.8.1 -> satisfiable by phpoffice/phpexcel[1.8.1].
    - Installation request for siu/chulupi-framework 2.0.2 -> satisfiable by siu/chulupi-framework[v2.0.2].

  To enable extensions, verify that they are enabled in your .ini files:
    - /etc/php/5.6/cli/php.ini
    - /etc/php/5.6/cli/conf.d/10-opcache.ini
    - /etc/php/5.6/cli/conf.d/10-pdo.ini
    - /etc/php/5.6/cli/conf.d/20-calendar.ini
    - /etc/php/5.6/cli/conf.d/20-ctype.ini
    - /etc/php/5.6/cli/conf.d/20-exif.ini
    - /etc/php/5.6/cli/conf.d/20-fileinfo.ini
    - /etc/php/5.6/cli/conf.d/20-ftp.ini
    - /etc/php/5.6/cli/conf.d/20-gettext.ini
    - /etc/php/5.6/cli/conf.d/20-iconv.ini
    - /etc/php/5.6/cli/conf.d/20-json.ini
    - /etc/php/5.6/cli/conf.d/20-phar.ini
    - /etc/php/5.6/cli/conf.d/20-posix.ini
    - /etc/php/5.6/cli/conf.d/20-readline.ini
    - /etc/php/5.6/cli/conf.d/20-shmop.ini
    - /etc/php/5.6/cli/conf.d/20-sockets.ini
    - /etc/php/5.6/cli/conf.d/20-sysvmsg.ini
    - /etc/php/5.6/cli/conf.d/20-sysvsem.ini
    - /etc/php/5.6/cli/conf.d/20-sysvshm.ini
    - /etc/php/5.6/cli/conf.d/20-tokenizer.ini
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.

Intente instalarlas con el comando pecl install pero no pude

Hola Walter

http://documentacion.siu.edu.ar/wiki/SIU-Guarani/version3.13.0/instalacion_desde_cero/requisitos_previos/linux

fijate lo que pide que instales

Emilio