Updating module using _update_n not appearing on update.php or in /modules/update I had to change the schema of a module I created. I added a function like this:

function cloudinary_update_7200() {    

  $spec = array(
    'keywords' =&gt; array('type' =&gt; 'longtext', 'not null' =&gt; FALSE),
    'primaryImage' =&gt; array('type' =&gt; 'tinyint', 'default' =&gt; 1, 'not null' =&gt; FALSE)
  );    

  $cloudinary_field_table = 'field_data_field_cloudinary';
  $revision_table_name = 'field_revision_field_cloudinary';    

  $keywords = 'field_cloudinary_keywords';
  db_add_field($cloudinary_field_table, $keywords, $spec);
  db_add_field($revision_table_name, $keywords, $spec);    

  $primaryImage = 'field_cloudinary_primaryImage';
  db_add_field($cloudinary_field_table, $primaryImage, $spec);
  db_add_field($revision_table_name, $primaryImage, $spec);    

  //UPDATE FIELDS
  $description_spec = array(
    'description' =&gt; array('type' =&gt; 'longtext', 'not null' =&gt; FALSE)
  );
  db_change_field($cloudinary_field_table, "field_cloudinary_alt", "field_cloudinary_description", $description_spec);    

}


So how do I get it to run? I've gone to /update.php but nothing. I tried /admin/modules/update and the module is not listed.

Yes, I have cleared my cash many many times. And yes, I've cleared it again.
Rename cloudinary_update_7200 to cloudinary_update_7100 in case if you are using 7.1 version (refer to hook_update_N) and try once again.
If it doesn't work perform SQL query to figure out the number of the latest performed update  of the module:

SELECT schema_version FROM system WHERE type = 'module' AND name = 'cloudinary';

If it is 0 - 7100 should work, if it is for instance 7101 - try cloudinary_update_7102.