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How can I take a site offline using Drush?

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Drupal 8: drush sset system.maintenance_mode TRUE

Drupal 7: drush vset maintenance_mode 1

Drupal 6: drush vset site_offline 1

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    If you are using drush-5.x, you may now simply use "drush vset maintenance_mode 1". Drush will rewrite maintenance_mode to site_offline for Drupal 6. (This feature is newer than the above answer.) – greg_1_anderson Dec 7 '11 at 18:28
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    Be sure to clear caches (drush cc all) after changing this variable. – smokris Mar 3 '12 at 0:53
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    Drupal 8: drush state-set system.maintenance_mode 1 (I don't like drush's aliases) – Andrea Apr 29 '16 at 14:23
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First you should cd into the correct directory so that you are within the Drupal directory. If you are using a multi site installation cd into the correct sites/sitename directory or specify the correct -l setting

In Drupal 6 only this command is actually required:

$ drush vset --yes site_offline 1;

Also in Drupal 6 you can use the following commands if you wish to specify a message to show to the users of the site whilst it is down.

$ drush vset --yes site_offline_message "This site is being maintained";
$ drush vset --yes site_offline 1;

In Drupal 7 use following command to put the site into maintenance mode:

$ drush vset --yes maintenance_mode 1;

To set an a specific message use:

$ drush variable-set --yes maintenance_mode_message "This site is being maintained"

It could be necessary to clear caches that the changes of these variables take effect:

$ drush cc all
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    This does not work if the variable does not already exist. You're missing the --always-set parameter. – Tobias Sjösten Mar 2 '11 at 21:10
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    The variable gets created by the installer though. Go install a fresh drupal and look in the variable table. – Stewart Robinson Mar 2 '11 at 21:23
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    Upvoted due to including the site_offline_message part. I believe the Drupal 7 equivalent of site_offline_message is maintenance_mode_message? – lolcode Mar 27 '13 at 13:32
  • You don't need to clear the cache, variable_set() does that for you: api.drupal.org/api/drupal/includes%21bootstrap.inc/function/… – mvc Jun 1 '16 at 12:30
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    variable_set only clears two caches. cache_clear_all('variables', 'cache_bootstrap'); – Stewart Robinson Jul 12 '16 at 13:15
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To do this with Drupal 8 and Drush 8.x use the state-set command:

drush sset system.maintenance_mode 1

At first, I assumed this would be something I would set with drush config-set system.maintenance, however the only keys in that configuration are message (the message displayed when maintenance mode is enabled) and langcode (the language code for said message).

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This is controlled by a variable, site_offline.

$ drush vset --always-set site_offline 1

You could also set the offline message this way.

$ drush vset --always-set site_offline_message 'Please try again later!'
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  • This would bring the site back up if it is down for maintenance. – Stewart Robinson Mar 2 '11 at 21:05
  • Thanks for pointing that out. Of course it should be set to 1, nothing else. – Tobias Sjösten Mar 2 '11 at 21:08
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From Drupal 6 use: 

drush vset site_offline 1

To take it out of maintenance:

drush vset site_offline 0
drush cc all
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