drush intall

sudo apt install composer

noah@ubuntuServer:/usr/share/php $ composer global require drush/drush:dev-master
Changed current directory to /home/noah/.config/composer
./composer.json has been created
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
    - Installation request for drush/drush dev-master -> satisfiable by drush/drush[dev-master].
    - drush/drush dev-master requires codegyre/robo ~1.0.0-beta1 -> no matching package found.

Potential causes:
 - A typo in the package name
 - The package is not available in a stable-enough version according to your minimum-stability setting
   see <https://getcomposer.org/doc/04-schema.md#minimum-stability> for more details.

Read <https://getcomposer.org/doc/articles/troubleshooting.md> for further common problems.

Installation failed, deleting ./composer.json.
noah@ubuntuServer:/usr/share/php $ curl -sS https://getcomposer.org/installer                                              | php
All settings correct for using Composer
Downloading 1.1.2...
Could not create file /usr/share/php/composer.phar: fopen(/usr/share/php/compo                                             ser.phar): failed to open stream: Permission denied
Download failed: fopen(/usr/share/php/composer.phar): failed to open stream: P                                             ermission denied
fwrite() expects parameter 1 to be resource, boolean given
Downloading 1.1.2...
Could not create file /usr/share/php/composer.phar: fopen(/usr/share/php/compo                                             ser.phar): failed to open stream: Permission denied
Download failed: fopen(/usr/share/php/composer.phar): failed to open stream: P                                             ermission denied
fwrite() expects parameter 1 to be resource, boolean given
Downloading 1.1.2...
Could not create file /usr/share/php/composer.phar: fopen(/usr/share/php/compo                                             ser.phar): failed to open stream: Permission denied
Download failed: fopen(/usr/share/php/composer.phar): failed to open stream: P                                             ermission denied
fwrite() expects parameter 1 to be resource, boolean given
The download failed repeatedly, aborting.
noah@ubuntuServer:/usr/share/php $ sudo curl -sS https://getcomposer.org/installer | sudo php
All settings correct for using Composer
Downloading 1.1.2...

Composer successfully installed to: /usr/share/php/composer.phar
Use it: php composer.phar

noah@ubuntuServer:~ $ sudo composer global require drush/drush:dev-master
[sudo] password for noah:
Changed current directory to /home/noah/.composer
Running composer as root/super user is highly discouraged as packages, plugins and scripts cannot always be trusted
./composer.json has been created
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
    - Installation request for drush/drush dev-master -> satisfiable by drush/drush[dev-master].
    - drush/drush dev-master requires codegyre/robo ~1.0.0-beta1 -> satisfiable by codegyre/robo[1.0.0-beta1] but these conflict with your requirements or minimum-stability.


Installation failed, deleting ./composer.json.
noah@ubuntuServer:~ $ sudo composer require drush/drush:~8
[sudo] password for noah:
Running composer as root/super user is highly discouraged as packages, plugins and scripts cannot always be trusted
./composer.json has been created
Loading composer repositories with package information
Updating dependencies (including require-dev)
    Failed to download pear/console_table from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /etc/php/7.0/cli/php.ini
    Now trying to download from source
  - Installing pear/console_table (v1.3.0)
    Cloning 64100b9ee81852f4fa17823e55d0b385a544f976

    Failed to download symfony/polyfill-mbstring from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /etc/php/7.0/cli/php.ini
    Now trying to download from source
  - Installing symfony/polyfill-mbstring (v1.2.0)
    Cloning dff51f72b0706335131b00a7f49606168c582594

    Failed to download symfony/console from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /etc/php/7.0/cli/php.ini
    Now trying to download from source
  - Installing symfony/console (v2.8.7)
    Cloning 5ac8bc9aa77bb2edf06af3a1bb6bc1020d23acd3

    Failed to download symfony/var-dumper from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /etc/php/7.0/cli/php.ini
    Now trying to download from source
  - Installing symfony/var-dumper (v2.8.7)
    Cloning 0c5970fc6cb9222b78559f20858f76db1e5ac326

    Failed to download symfony/yaml from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /etc/php/7.0/cli/php.ini
    Now trying to download from source
  - Installing symfony/yaml (v2.8.7)
    Cloning 815fabf3f48c7d1df345a69d1ad1a88f59757b34

    Failed to download jakub-onderka/php-console-color from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /etc/php/7.0/cli/php.ini
    Now trying to download from source
  - Installing jakub-onderka/php-console-color (0.1)
    Cloning e0b393dacf7703fc36a4efc3df1435485197e6c1

    Failed to download jakub-onderka/php-console-highlighter from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /etc/php/7.0/cli/php.ini
    Now trying to download from source
  - Installing jakub-onderka/php-console-highlighter (v0.3.2)
    Cloning 7daa75df45242c8d5b75a22c00a201e7954e4fb5

    Failed to download dnoegel/php-xdg-base-dir from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /etc/php/7.0/cli/php.ini
    Now trying to download from source
  - Installing dnoegel/php-xdg-base-dir (0.1)
    Cloning 265b8593498b997dc2d31e75b89f053b5cc9621a

    Failed to download nikic/php-parser from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /etc/php/7.0/cli/php.ini
    Now trying to download from source
  - Installing nikic/php-parser (v2.1.0)
    Cloning 47b254ea51f1d6d5dc04b9b299e88346bf2369e3

    Failed to download psy/psysh from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /etc/php/7.0/cli/php.ini
    Now trying to download from source
  - Installing psy/psysh (v0.7.2)
    Cloning e64e10b20f8d229cac76399e1f3edddb57a0f280

    Failed to download psr/log from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /etc/php/7.0/cli/php.ini
    Now trying to download from source
  - Installing psr/log (1.0.0)
    Cloning fe0936ee26643249e916849d48e3a51d5f5e278b

    Failed to download drush/drush from dist: The zip extension and unzip command are both missing, skipping.
The php.ini used by your command-line PHP is: /etc/php/7.0/cli/php.ini
    Now trying to download from source
  - Installing drush/drush (8.1.2)
    Cloning 85b58140d576cfdb9546a23c3ff44b72d0dae5bc

pear/console_table suggests installing pear/Console_Color2 (>=0.1.2)
symfony/console suggests installing symfony/event-dispatcher ()
symfony/console suggests installing symfony/process ()
symfony/var-dumper suggests installing ext-symfony_debug ()
psy/psysh suggests installing ext-pdo-sqlite (The doc command requires SQLite to work.)
drush/drush suggests installing drush/config-extra (Provides configuration workflow commands, such as config-merge.)
Writing lock file
Generating autoload files
noah@ubuntuServer:~ $ drush status
The program 'drush' is currently not installed. You can install it by typing:
sudo apt install drush
noah@ubuntuServer:~ $