Beginning Drupal 8

Chapter 15 ■ Using Drush
4. Configure your system to recognize where Drush resides. There are three
options:
a. Create a symbolic link to the Drush executable in a directory that is already
in your PATH; for example:
$ ln -s /path/to/drush/drush /usr/bin/drush
b. Explicitly add the Drush executable to the PATH variable, which is defined
in the shell configuration file, called .profile, .bash_profile, .bash_
aliases, or .bashrc, that is located in your home folder; for example:
export PATH="$PATH:/path/to/drush:/usr/local/bin"
Your system will search path options from left to right until it finds a result.
c. Add an alias for Drush; this method can also be handy if you want to use two
versions of Drush, such as Drush 5 or 6 (stable) for Drupal 7 development
and Drush 7 (master) for Drupal 8 development. To add an alias to your
Drush 7 executable, add this to your shell configuration file (see list in
previous option):
$ alias drush-master=/path/to/drush/drush
For options b and c, to apply your changes to your current session, either log out
and then log back in again, or reload your bash configuration file as follows:
$ source .bashrc
■■Note
If you do not follow this step, you will need to (inconveniently) run Drush commands either by using
the full path to the executable, /path/to/drush/drush, or by navigating to /path/to/drush and running Drush
./drush. The -r or -l option will be required (see USAGE, below).
5. Test that Drush is found by your system:
$ which drush
6. From Drush root, run Composer to fetch dependencies:
$ composer install
For more information about Composer, please visit https://getcomposer.org/doc/00-intro.md.
Installing Drush on Windows
To install Drush on Windows visit https://www.drupal.org/node/594744 for the latest instructions on how
to install Drush on Windows. The approach varies for version of Drush and version of Windows.
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