diff --git a/app/assets/javascripts/app/controllers/network.coffee b/app/assets/javascripts/app/controllers/network.coffee
index 43ea9b35d..e0c165635 100644
--- a/app/assets/javascripts/app/controllers/network.coffee
+++ b/app/assets/javascripts/app/controllers/network.coffee
@@ -2,19 +2,19 @@ class Index extends App.ControllerContent
   events:
     'click [data-type=network-new]':              'network_new'
     'click [data-type=network-edit]':             'network_edit'
-    'click [data-type=network-destroy]':          'network_destory'
+    'click [data-type=network-destroy]':          'network_destroy'
     'click [data-type=network-category-new]':     'network_category_new'
     'click [data-type=network-category-edit]':    'network_category_edit'
     'click [data-type=network-category-destroy]': 'network_category_destroy'
 
   constructor: ->
     super
-    
+
     # set title
     @title 'Network'
     @render()
     @navupdate '#network'
-    
+
   render: ->
     networks = App.Network.all()
     network_categories = App.NetworkCategory.all()
@@ -23,11 +23,11 @@ class Index extends App.ControllerContent
 
     for network_category in network_categories
       @log 'notice', network_category
-      
+
     @html App.view('network')(
       networks: App.Network.all(),
     )
-    
+
   network_new: (e) ->
     e.preventDefault()
     new App.ControllerGenericNewWindow(
@@ -38,7 +38,7 @@ class Index extends App.ControllerContent
       success: =>
         @render()
     )
-        
+
   network_edit: (e) ->
     e.preventDefault()
     @id = $(e.target).parents('[data-id]').data('id')
@@ -51,8 +51,8 @@ class Index extends App.ControllerContent
       success: =>
         @render()
     )
-    
-  network_destory: (e) ->
+
+  network_destroy: (e) ->
     e.preventDefault()
     id = $(e.target).parents('[data-id]').data('id')
     item = App.Network.find(id)
diff --git a/app/assets/javascripts/app/lib/app_post/task_manager.coffee b/app/assets/javascripts/app/lib/app_post/task_manager.coffee
index fb9331f66..3a8f33a84 100644
--- a/app/assets/javascripts/app/lib/app_post/task_manager.coffee
+++ b/app/assets/javascripts/app/lib/app_post/task_manager.coffee
@@ -544,7 +544,7 @@ class _taskManagerSingleton extends App.Controller
       )
       return
 
-    # destory task in backend
+    # destroy task in backend
     delete @tasksToUpdate[ task.key ]
 
     # if task isnt already stored on backend
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index d6c2a8451..8c15eee59 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -561,13 +561,13 @@ class ApplicationController < ActionController::Base
     render json: generic_object.attributes_with_associations, status: :ok
   end
 
-  def model_destory_render(object, params)
+  def model_destroy_render(object, params)
     generic_object = object.find(params[:id])
     generic_object.destroy!
-    model_destory_render_item()
+    model_destroy_render_item()
   end
 
-  def model_destory_render_item ()
+  def model_destroy_render_item ()
     render json: {}, status: :ok
   end
 
diff --git a/app/controllers/calendars_controller.rb b/app/controllers/calendars_controller.rb
index 184317030..01240e53d 100644
--- a/app/controllers/calendars_controller.rb
+++ b/app/controllers/calendars_controller.rb
@@ -36,7 +36,7 @@ class CalendarsController < ApplicationController
   end
 
   def destroy
-    model_destory_render(Calendar, params)
+    model_destroy_render(Calendar, params)
   end
 
 end
diff --git a/app/controllers/channels_controller.rb b/app/controllers/channels_controller.rb
index 371ba726c..818ac9525 100644
--- a/app/controllers/channels_controller.rb
+++ b/app/controllers/channels_controller.rb
@@ -42,7 +42,7 @@ curl http://localhost/api/v1/channels.json -v -u #{login}:#{password} -H "Conten
   def destroy
     permission_check('admin')
     check_access
-    model_destory_render(Channel, params)
+    model_destroy_render(Channel, params)
   end
 
   def twitter_index
diff --git a/app/controllers/chats_controller.rb b/app/controllers/chats_controller.rb
index 607154cf8..ef7379105 100644
--- a/app/controllers/chats_controller.rb
+++ b/app/controllers/chats_controller.rb
@@ -31,7 +31,7 @@ class ChatsController < ApplicationController
   end
 
   def destroy
-    model_destory_render(Chat, params)
+    model_destroy_render(Chat, params)
   end
 
 end
diff --git a/app/controllers/email_addresses_controller.rb b/app/controllers/email_addresses_controller.rb
index e7a8433a1..22ccf94cc 100644
--- a/app/controllers/email_addresses_controller.rb
+++ b/app/controllers/email_addresses_controller.rb
@@ -149,6 +149,6 @@ curl http://localhost/api/v1/email_addresses/#{id}.json -v -u #{login}:#{passwor
 
   def destroy
     permission_check('admin.channel_email')
-    model_destory_render(EmailAddress, params)
+    model_destroy_render(EmailAddress, params)
   end
 end
diff --git a/app/controllers/external_credentials_controller.rb b/app/controllers/external_credentials_controller.rb
index 66b0445ad..8e25702fb 100644
--- a/app/controllers/external_credentials_controller.rb
+++ b/app/controllers/external_credentials_controller.rb
@@ -20,7 +20,7 @@ class ExternalCredentialsController < ApplicationController
   end
 
   def destroy
-    model_destory_render(ExternalCredential, params)
+    model_destroy_render(ExternalCredential, params)
   end
 
   def app_verify
diff --git a/app/controllers/groups_controller.rb b/app/controllers/groups_controller.rb
index a20c9c786..a1abb05d2 100644
--- a/app/controllers/groups_controller.rb
+++ b/app/controllers/groups_controller.rb
@@ -149,6 +149,6 @@ curl http://localhost/api/v1/groups/{id} -v -u #{login}:#{password} -H "Content-
 =end
 
   def destroy
-    model_destory_render(Group, params)
+    model_destroy_render(Group, params)
   end
 end
diff --git a/app/controllers/jobs_controller.rb b/app/controllers/jobs_controller.rb
index b0233a7aa..660d6c2b8 100644
--- a/app/controllers/jobs_controller.rb
+++ b/app/controllers/jobs_controller.rb
@@ -20,7 +20,7 @@ class JobsController < ApplicationController
   end
 
   def destroy
-    model_destory_render(Job, params)
+    model_destroy_render(Job, params)
   end
 
 end
diff --git a/app/controllers/macros_controller.rb b/app/controllers/macros_controller.rb
index a8f4f1d68..01ce8e0b7 100644
--- a/app/controllers/macros_controller.rb
+++ b/app/controllers/macros_controller.rb
@@ -150,6 +150,6 @@ curl http://localhost/api/v1/macros.json -v -u #{login}:#{password} -H "Content-
 =end
 
   def destroy
-    model_destory_render(Macro, params)
+    model_destroy_render(Macro, params)
   end
 end
diff --git a/app/controllers/object_manager_attributes_controller.rb b/app/controllers/object_manager_attributes_controller.rb
index 185af695b..066fd76d7 100644
--- a/app/controllers/object_manager_attributes_controller.rb
+++ b/app/controllers/object_manager_attributes_controller.rb
@@ -77,7 +77,7 @@ class ObjectManagerAttributesController < ApplicationController
       object_lookup_id: object_manager_attribute.object_lookup_id,
       name: object_manager_attribute.name,
     )
-    model_destory_render_item
+    model_destroy_render_item
   end
 
   # POST /object_manager_attributes_discard_changes
diff --git a/app/controllers/online_notifications_controller.rb b/app/controllers/online_notifications_controller.rb
index 0565e7d82..3e2a5f80f 100644
--- a/app/controllers/online_notifications_controller.rb
+++ b/app/controllers/online_notifications_controller.rb
@@ -99,7 +99,7 @@ curl http://localhost/api/v1/online_notifications/{id}.json -v -u #{login}:#{pas
 
   def destroy
     return if !access?
-    model_destory_render(OnlineNotification, params)
+    model_destroy_render(OnlineNotification, params)
   end
 
 =begin
diff --git a/app/controllers/organizations_controller.rb b/app/controllers/organizations_controller.rb
index bdf5322fb..0932fb9ec 100644
--- a/app/controllers/organizations_controller.rb
+++ b/app/controllers/organizations_controller.rb
@@ -216,7 +216,7 @@ curl http://localhost/api/v1/organization/{id} -v -u #{login}:#{password} -H "Co
   def destroy
     permission_check('ticket.agent')
     model_references_check(Organization, params)
-    model_destory_render(Organization, params)
+    model_destroy_render(Organization, params)
   end
 
   # GET /api/v1/organizations/search
diff --git a/app/controllers/overviews_controller.rb b/app/controllers/overviews_controller.rb
index f082a1383..bfff62ae7 100644
--- a/app/controllers/overviews_controller.rb
+++ b/app/controllers/overviews_controller.rb
@@ -156,6 +156,6 @@ curl http://localhost/api/v1/overviews/#{id}.json -v -u #{login}:#{password} -H
 =end
 
   def destroy
-    model_destory_render(Overview, params)
+    model_destroy_render(Overview, params)
   end
 end
diff --git a/app/controllers/postmaster_filters_controller.rb b/app/controllers/postmaster_filters_controller.rb
index 391eb44e1..3986221b4 100644
--- a/app/controllers/postmaster_filters_controller.rb
+++ b/app/controllers/postmaster_filters_controller.rb
@@ -175,6 +175,6 @@ Test:
 =end
 
   def destroy
-    model_destory_render(PostmasterFilter, params)
+    model_destroy_render(PostmasterFilter, params)
   end
 end
diff --git a/app/controllers/report_profiles_controller.rb b/app/controllers/report_profiles_controller.rb
index f88933fd2..48221a225 100644
--- a/app/controllers/report_profiles_controller.rb
+++ b/app/controllers/report_profiles_controller.rb
@@ -136,7 +136,7 @@ curl http://localhost/api/report_profiles.json -v -u #{login}:#{password} -H "Co
 =end
 
   def destroy
-    model_destory_render(Report::Profile, params)
+    model_destroy_render(Report::Profile, params)
   end
 
 end
diff --git a/app/controllers/roles_controller.rb b/app/controllers/roles_controller.rb
index 569f9b531..560d95195 100644
--- a/app/controllers/roles_controller.rb
+++ b/app/controllers/roles_controller.rb
@@ -137,6 +137,6 @@ Test:
 =end
 
   def destroy
-    model_destory_render(Role, params)
+    model_destroy_render(Role, params)
   end
 end
diff --git a/app/controllers/signatures_controller.rb b/app/controllers/signatures_controller.rb
index 0aa7476aa..88359225c 100644
--- a/app/controllers/signatures_controller.rb
+++ b/app/controllers/signatures_controller.rb
@@ -143,6 +143,6 @@ Test:
 
   def destroy
     permission_check(['admin.channel_email'])
-    model_destory_render(Signature, params)
+    model_destroy_render(Signature, params)
   end
 end
diff --git a/app/controllers/slas_controller.rb b/app/controllers/slas_controller.rb
index 0439ee904..160281f22 100644
--- a/app/controllers/slas_controller.rb
+++ b/app/controllers/slas_controller.rb
@@ -164,7 +164,7 @@ curl http://localhost/api/v1/slas.json -v -u #{login}:#{password} -H "Content-Ty
 =end
 
   def destroy
-    model_destory_render(Sla, params)
+    model_destroy_render(Sla, params)
   end
 
 end
diff --git a/app/controllers/taskbar_controller.rb b/app/controllers/taskbar_controller.rb
index 635a18177..bbd6703db 100644
--- a/app/controllers/taskbar_controller.rb
+++ b/app/controllers/taskbar_controller.rb
@@ -34,7 +34,7 @@ class TaskbarController < ApplicationController
     access(taskbar)
 
     taskbar.destroy
-    model_destory_render_item()
+    model_destroy_render_item()
   end
 
   private
diff --git a/app/controllers/templates_controller.rb b/app/controllers/templates_controller.rb
index e769e638d..5b3fef692 100644
--- a/app/controllers/templates_controller.rb
+++ b/app/controllers/templates_controller.rb
@@ -144,6 +144,6 @@ curl http://localhost/api/v1/templates.json -v -u #{login}:#{password} -H "Conte
 
   def destroy
     permission_check(['admin.template', 'ticket.agent'])
-    model_destory_render(Template, params)
+    model_destroy_render(Template, params)
   end
 end
diff --git a/app/controllers/text_modules_controller.rb b/app/controllers/text_modules_controller.rb
index ecf8d12cf..46b038b2c 100644
--- a/app/controllers/text_modules_controller.rb
+++ b/app/controllers/text_modules_controller.rb
@@ -150,6 +150,6 @@ curl http://localhost/api/v1/text_modules.json -v -u #{login}:#{password} -H "Co
 
   def destroy
     permission_check('admin.text_module')
-    model_destory_render(TextModule, params)
+    model_destroy_render(TextModule, params)
   end
 end
diff --git a/app/controllers/ticket_priorities_controller.rb b/app/controllers/ticket_priorities_controller.rb
index d0fab507c..4d14af2df 100644
--- a/app/controllers/ticket_priorities_controller.rb
+++ b/app/controllers/ticket_priorities_controller.rb
@@ -31,6 +31,6 @@ class TicketPrioritiesController < ApplicationController
   def destroy
     permission_check('admin.object')
     model_references_check(Ticket::Priority, params)
-    model_destory_render(Ticket::Priority, params)
+    model_destroy_render(Ticket::Priority, params)
   end
 end
diff --git a/app/controllers/ticket_states_controller.rb b/app/controllers/ticket_states_controller.rb
index 2d7b6f128..fa66a8376 100644
--- a/app/controllers/ticket_states_controller.rb
+++ b/app/controllers/ticket_states_controller.rb
@@ -31,6 +31,6 @@ class TicketStatesController < ApplicationController
   def destroy
     permission_check('admin.object')
     return if model_references_check(Ticket::State, params)
-    model_destory_render(Ticket::State, params)
+    model_destroy_render(Ticket::State, params)
   end
 end
diff --git a/app/controllers/translations_controller.rb b/app/controllers/translations_controller.rb
index 274b6fd18..d58353a54 100644
--- a/app/controllers/translations_controller.rb
+++ b/app/controllers/translations_controller.rb
@@ -66,6 +66,6 @@ class TranslationsController < ApplicationController
   # DELETE /translations/1
   def destroy
     permission_check('admin.translation')
-    model_destory_render(Translation, params)
+    model_destroy_render(Translation, params)
   end
 end
diff --git a/app/controllers/triggers_controller.rb b/app/controllers/triggers_controller.rb
index 4b51aa250..a353f7b03 100644
--- a/app/controllers/triggers_controller.rb
+++ b/app/controllers/triggers_controller.rb
@@ -20,7 +20,7 @@ class TriggersController < ApplicationController
   end
 
   def destroy
-    model_destory_render(Trigger, params)
+    model_destroy_render(Trigger, params)
   end
 
 end
diff --git a/app/controllers/users_controller.rb b/app/controllers/users_controller.rb
index 2311e10f5..be9db09a3 100644
--- a/app/controllers/users_controller.rb
+++ b/app/controllers/users_controller.rb
@@ -303,7 +303,7 @@ class UsersController < ApplicationController
   def destroy
     permission_check('admin.user')
     model_references_check(User, params)
-    model_destory_render(User, params)
+    model_destroy_render(User, params)
   end
 
   # @path       [GET] /users/me
diff --git a/app/models/application_model.rb b/app/models/application_model.rb
index 77d4a7c7a..51d4426a4 100644
--- a/app/models/application_model.rb
+++ b/app/models/application_model.rb
@@ -1591,7 +1591,7 @@ check string/varchar size and cut them if needed
 
 =begin
 
-destory object dependencies, will be executed automatically
+destroy object dependencies, will be executed automatically
 
 =end
 
diff --git a/lib/sessions.rb b/lib/sessions.rb
index 21e55e3fe..f2bfb4950 100644
--- a/lib/sessions.rb
+++ b/lib/sessions.rb
@@ -46,9 +46,9 @@ returns
       file.write content
     }
 
-    # destory old session if needed
+    # destroy old session if needed
     if File.exist?(path)
-      Sessions.destory(client_id)
+      Sessions.destroy(client_id)
     end
 
     # move to destination directory
@@ -160,7 +160,7 @@ returns
 
 destroy session
 
-  Sessions.destory(client_id)
+  Sessions.destroy(client_id)
 
 returns
 
@@ -168,7 +168,7 @@ returns
 
 =end
 
-  def self.destory(client_id)
+  def self.destroy(client_id)
     path = "#{@path}/#{client_id}"
     FileUtils.rm_rf path
   end
@@ -177,7 +177,7 @@ returns
 
 destroy idle session
 
-  list_of_client_ids = Sessions.destory_idle_sessions
+  list_of_client_ids = Sessions.destroy_idle_sessions
 
 returns
 
@@ -185,13 +185,13 @@ returns
 
 =end
 
-  def self.destory_idle_sessions(idle_time_in_sec = 240)
+  def self.destroy_idle_sessions(idle_time_in_sec = 240)
     list_of_closed_sessions = []
     clients                 = Sessions.list
     clients.each { |client_id, client|
       if !client[:meta] || !client[:meta][:last_ping] || ( client[:meta][:last_ping].to_i + idle_time_in_sec ) < Time.now.utc.to_i
         list_of_closed_sessions.push client_id
-        Sessions.destory(client_id)
+        Sessions.destroy(client_id)
       end
     }
     list_of_closed_sessions
@@ -248,14 +248,14 @@ returns
 
     # if no session dir exists, session got destoried
     if !File.exist? session_dir
-      destory(client_id)
+      destroy(client_id)
       log('debug', "missing session directory for '#{client_id}', remove session.")
       return
     end
 
     # if only session file is missing, then it's an error behavior
     if !File.exist? session_file
-      destory(client_id)
+      destroy(client_id)
       log('error', "missing session file for '#{client_id}', remove session.")
       return
     end
@@ -272,7 +272,7 @@ returns
       }
     rescue => e
       log('error', e.inspect)
-      destory(client_id)
+      destroy(client_id)
       log('error', "error in reading/parsing session file '#{session_file}', remove session.")
       return
     end
diff --git a/script/websocket-server.rb b/script/websocket-server.rb
index 541aba103..7affdb355 100755
--- a/script/websocket-server.rb
+++ b/script/websocket-server.rb
@@ -128,7 +128,7 @@ EventMachine.run {
         @clients.delete client_id
       end
 
-      Sessions.destory(client_id)
+      Sessions.destroy(client_id)
     }
 
     # manage messages
@@ -277,7 +277,7 @@ EventMachine.run {
     }
 
     # close unused ajax long polling sessions
-    clients = Sessions.destory_idle_sessions(idle_time_in_sec)
+    clients = Sessions.destroy_idle_sessions(idle_time_in_sec)
     clients.each { |client_id|
       log 'notice', 'closing idle long polling connection', client_id
     }
diff --git a/test/unit/session_basic_test.rb b/test/unit/session_basic_test.rb
index 307fe140e..440afcae6 100644
--- a/test/unit/session_basic_test.rb
+++ b/test/unit/session_basic_test.rb
@@ -98,7 +98,7 @@ class SessionBasicTest < ActiveSupport::TestCase
     assert_equal(data[:user]['id'], agent1.id, 'check if user id is correct')
 
     # destroy session
-    Sessions.destory(client_id1)
+    Sessions.destroy(client_id1)
 
     # check if session exists
     assert(!Sessions.session_exists?(client_id1), 'check if session exists')
diff --git a/test/unit/session_enhanced_test.rb b/test/unit/session_enhanced_test.rb
index adcc85daa..e9f1dc99f 100644
--- a/test/unit/session_enhanced_test.rb
+++ b/test/unit/session_enhanced_test.rb
@@ -50,9 +50,9 @@ class SessionEnhancedTest < ActiveSupport::TestCase
     client_id1 = '1234'
     client_id2 = '123456'
     client_id3 = 'abc'
-    Sessions.destory(client_id1)
-    Sessions.destory(client_id2)
-    Sessions.destory(client_id3)
+    Sessions.destroy(client_id1)
+    Sessions.destroy(client_id2)
+    Sessions.destroy(client_id3)
     Sessions.create(client_id1, agent1.attributes, { type: 'websocket' })
     Sessions.create(client_id2, agent2.attributes, { type: 'ajax' })
     Sessions.create(client_id3, agent3.attributes, { type: 'ajax' })
@@ -64,7 +64,7 @@ class SessionEnhancedTest < ActiveSupport::TestCase
 
     # check if session still exists after idle cleanup
     sleep 1
-    Sessions.destory_idle_sessions(3)
+    Sessions.destroy_idle_sessions(3)
     assert(Sessions.session_exists?(client_id1), 'check if session exists after 1 sec')
     assert(Sessions.session_exists?(client_id2), 'check if session exists after 1 sec')
     assert(Sessions.session_exists?(client_id3), 'check if session exists after 1 sec')
@@ -74,7 +74,7 @@ class SessionEnhancedTest < ActiveSupport::TestCase
     Sessions.touch(client_id1)
     Sessions.touch(client_id2)
     Sessions.touch(client_id3)
-    Sessions.destory_idle_sessions(3)
+    Sessions.destroy_idle_sessions(3)
     assert(Sessions.session_exists?(client_id1), 'check if session exists after touch')
     assert(Sessions.session_exists?(client_id2), 'check if session exists after touch')
     assert(Sessions.session_exists?(client_id3), 'check if session exists after touch')
@@ -155,7 +155,7 @@ class SessionEnhancedTest < ActiveSupport::TestCase
 
     # check if session still exists after idle cleanup
     sleep 4
-    client_ids = Sessions.destory_idle_sessions(3)
+    client_ids = Sessions.destroy_idle_sessions(3)
 
     # check client sessions
     assert(!Sessions.session_exists?(client_id1), 'check if session is removed')
@@ -216,9 +216,9 @@ class SessionEnhancedTest < ActiveSupport::TestCase
     client_id1_0 = '1234-1'
     client_id1_1 = '1234-2'
     client_id2   = '123456'
-    Sessions.destory(client_id1_0)
-    Sessions.destory(client_id1_1)
-    Sessions.destory(client_id2)
+    Sessions.destroy(client_id1_0)
+    Sessions.destroy(client_id1_1)
+    Sessions.destroy(client_id2)
 
     # start jobs
     jobs = Thread.new {
@@ -281,7 +281,7 @@ class SessionEnhancedTest < ActiveSupport::TestCase
 
     # check if session still exists after idle cleanup
     sleep 4
-    client_ids = Sessions.destory_idle_sessions(3)
+    client_ids = Sessions.destroy_idle_sessions(3)
 
     # check client sessions
     assert(!Sessions.session_exists?(client_id1_0), 'check if session is removed')