title: While installing Magento 2 on Ubuntu LTS 16.04, i am getting some different error
body: <p>I have already installed these packages.</p>
  
  <pre><code>sudo apt-get install apache2 php libapache2-mod-php mysql-server php-mysql php-dom \
  php-simplexml php-curl php-intl php-xsl php-mbstring php-zip php-xml composer
  </code></pre>
  
  <p>After this command </p>
  
  <pre><code>composer install
  </code></pre>
  
  <p>I am getting this error</p>
  
  <pre><code>Problem 1
      - This package requires php ~7.1.3||~7.2.0 but your PHP version (7.0.32) does not satisfy that requirement.
    Problem 2
      - The requested PHP extension ext-bcmath * is missing from your system. Install or enable PHP's bcmath extension.
    Problem 3
      - The requested PHP extension ext-soap * is missing from your system. Install or enable PHP's soap extension.
    Problem 4
      - Installation request for magento/composer 1.4.0 -&gt; satisfiable by magento/composer[1.4.0].
      - magento/composer 1.4.0 requires php ~7.1.3|~7.2.0 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 5
      - Installation request for php-amqplib/php-amqplib v2.7.3 -&gt; satisfiable by php-amqplib/php-amqplib[v2.7.3].
      - php-amqplib/php-amqplib v2.7.3 requires ext-bcmath * -&gt; the requested PHP extension bcmath is missing from your system.
    Problem 6
      - Installation request for symfony/console v4.1.6 -&gt; satisfiable by symfony/console[v4.1.6].
      - symfony/console v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 7
      - Installation request for symfony/event-dispatcher v4.1.6 -&gt; satisfiable by symfony/event-dispatcher[v4.1.6].
      - symfony/event-dispatcher v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 8
      - Installation request for symfony/filesystem v4.1.6 -&gt; satisfiable by symfony/filesystem[v4.1.6].
      - symfony/filesystem v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 9
      - Installation request for symfony/finder v4.1.6 -&gt; satisfiable by symfony/finder[v4.1.6].
      - symfony/finder v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 10
      - Installation request for symfony/process v4.1.6 -&gt; satisfiable by symfony/process[v4.1.6].
      - symfony/process v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 11
      - Installation request for zendframework/zend-code 3.3.1 -&gt; satisfiable by zendframework/zend-code[3.3.1].
      - zendframework/zend-code 3.3.1 requires php ^7.1 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 12
      - Installation request for zendframework/zend-soap 2.7.0 -&gt; satisfiable by zendframework/zend-soap[2.7.0].
      - zendframework/zend-soap 2.7.0 requires ext-soap * -&gt; the requested PHP extension soap is missing from your system.
    Problem 13
      - Installation request for doctrine/annotations v1.6.0 -&gt; satisfiable by doctrine/annotations[v1.6.0].
      - doctrine/annotations v1.6.0 requires php ^7.1 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 14
      - Installation request for doctrine/collections v1.5.0 -&gt; satisfiable by doctrine/collections[v1.5.0].
      - doctrine/collections v1.5.0 requires php ^7.1 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 15
      - Installation request for doctrine/instantiator 1.1.0 -&gt; satisfiable by doctrine/instantiator[1.1.0].
      - doctrine/instantiator 1.1.0 requires php ^7.1 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 16
      - Installation request for moontoast/math 1.1.2 -&gt; satisfiable by moontoast/math[1.1.2].
      - moontoast/math 1.1.2 requires ext-bcmath * -&gt; the requested PHP extension bcmath is missing from your system.
    Problem 17
      - Installation request for myclabs/deep-copy 1.8.1 -&gt; satisfiable by myclabs/deep-copy[1.8.1].
      - myclabs/deep-copy 1.8.1 requires php ^7.1 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 18
      - Installation request for symfony/browser-kit v4.1.6 -&gt; satisfiable by symfony/browser-kit[v4.1.6].
      - symfony/browser-kit v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 19
      - Installation request for symfony/config v4.1.6 -&gt; satisfiable by symfony/config[v4.1.6].
      - symfony/config v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 20
      - Installation request for symfony/css-selector v4.1.6 -&gt; satisfiable by symfony/css-selector[v4.1.6].
      - symfony/css-selector v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 21
      - Installation request for symfony/dependency-injection v4.1.6 -&gt; satisfiable by symfony/dependency-injection[v4.1.6].
      - symfony/dependency-injection v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 22
      - Installation request for symfony/dom-crawler v4.1.6 -&gt; satisfiable by symfony/dom-crawler[v4.1.6].
      - symfony/dom-crawler v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 23
      - Installation request for symfony/http-foundation v4.1.6 -&gt; satisfiable by symfony/http-foundation[v4.1.6].
      - symfony/http-foundation v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 24
      - Installation request for symfony/options-resolver v4.1.6 -&gt; satisfiable by symfony/options-resolver[v4.1.6].
      - symfony/options-resolver v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 25
      - Installation request for symfony/stopwatch v4.1.6 -&gt; satisfiable by symfony/stopwatch[v4.1.6].
      - symfony/stopwatch v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
    Problem 26
      - symfony/console v4.1.6 requires php ^7.1.3 -&gt; your PHP version (7.0.32) does not satisfy that requirement.
      - sebastian/phpcpd 3.0.1 requires symfony/console ^2.7|^3.0|^4.0 -&gt; satisfiable by symfony/console[v4.1.6].
      - Installation request for sebastian/phpcpd 3.0.1 -&gt; satisfiable by sebastian/phpcpd[3.0.1].
  
  To enable extensions, verify that they are enabled in those .ini files:
  
  - /etc/php/7.0/cli/php.ini
  - /etc/php/7.0/cli/conf.d/10-mysqlnd.ini
  - /etc/php/7.0/cli/conf.d/10-opcache.ini
  - /etc/php/7.0/cli/conf.d/10-pdo.ini
  - /etc/php/7.0/cli/conf.d/15-xml.ini
  - /etc/php/7.0/cli/conf.d/20-calendar.ini
  - /etc/php/7.0/cli/conf.d/20-ctype.ini
  - /etc/php/7.0/cli/conf.d/20-curl.ini
  - /etc/php/7.0/cli/conf.d/20-dom.ini
  - /etc/php/7.0/cli/conf.d/20-exif.ini
  - /etc/php/7.0/cli/conf.d/20-fileinfo.ini
  - /etc/php/7.0/cli/conf.d/20-ftp.ini
  - /etc/php/7.0/cli/conf.d/20-gd.ini
  - /etc/php/7.0/cli/conf.d/20-gettext.ini
  - /etc/php/7.0/cli/conf.d/20-iconv.ini
  - /etc/php/7.0/cli/conf.d/20-intl.ini
  - /etc/php/7.0/cli/conf.d/20-json.ini
  - /etc/php/7.0/cli/conf.d/20-mbstring.ini
  - /etc/php/7.0/cli/conf.d/20-mcrypt.ini
  - /etc/php/7.0/cli/conf.d/20-mysqli.ini
  - /etc/php/7.0/cli/conf.d/20-pdo_mysql.ini
  - /etc/php/7.0/cli/conf.d/20-phar.ini
  - /etc/php/7.0/cli/conf.d/20-posix.ini
  - /etc/php/7.0/cli/conf.d/20-readline.ini
  - /etc/php/7.0/cli/conf.d/20-shmop.ini
  - /etc/php/7.0/cli/conf.d/20-simplexml.ini
  - /etc/php/7.0/cli/conf.d/20-sockets.ini
  - /etc/php/7.0/cli/conf.d/20-sysvmsg.ini
  - /etc/php/7.0/cli/conf.d/20-sysvsem.ini
  - /etc/php/7.0/cli/conf.d/20-sysvshm.ini
  - /etc/php/7.0/cli/conf.d/20-tokenizer.ini
  - /etc/php/7.0/cli/conf.d/20-wddx.ini
  - /etc/php/7.0/cli/conf.d/20-xmlreader.ini
  - /etc/php/7.0/cli/conf.d/20-xmlwriter.ini
  - /etc/php/7.0/cli/conf.d/20-xsl.ini
  - /etc/php/7.0/cli/conf.d/20-zip.ini
  
  You can also run `php --ini` inside terminal to see which files are used by PHP in CLI mode.
  </code></pre>