diff --git a/README.md b/README.md
index 35017df9..2756affa 100644
--- a/README.md
+++ b/README.md
@@ -110,7 +110,7 @@ Note: Passing credentials via the command line exposes the credentials in your s
 
 ## Additional config.rb & knife.rb Configuration Options
 
-The following configuration options may be set in your `knife.rb`:
+The following configuration options may be set in your configuration file:
 - flavor
 - image
 - availability_zone
@@ -144,7 +144,7 @@ knife-ec2 now includes the ability to retrieve the encrypted data bag secret and
 - `http` or `https` based: 'http://example.com/chef/my-validator.pem'
 - `s3` based:  's3://chef/my-validator.pem'
 
-### Use the following configuration options in `knife.rb` to set the source URLs:
+### Use the following configuration options in `knife.rb` or `config.rb` to set the source URLs:
 
 ```ruby
 knife[:validation_key_url] = 'http://example.com/chef/my-validator.pem'
@@ -250,7 +250,7 @@ knife ec2 ami list
 
   ```
   :Allowed platform             windows, ubuntu, debian, centos, fedora, rhel, nginx, turnkey, jumpbox, coreos, cisco, amazon, nessus
-  ```  
+  ```
 - **Search:**
   User can search any string into the description column by using -s or --search:
 
@@ -258,7 +258,7 @@ knife ec2 ami list
 
   ```
   :search_keyword             Any String or number
-  ```  
+  ```
 
 ### `knife ec2 server list`
 
diff --git a/lib/chef/knife/ec2_base.rb b/lib/chef/knife/ec2_base.rb
index cbdf0b11..03398f2a 100644
--- a/lib/chef/knife/ec2_base.rb
+++ b/lib/chef/knife/ec2_base.rb
@@ -223,7 +223,7 @@ def find_server_platform(server_name)
     # Custom Warning
     def custom_warnings!
       if !config[:region] && Chef::Config[:knife][:region].nil?
-        ui.warn "No region was specified in knife.rb or as an argument. The default region, us-east-1, will be used:"
+        ui.warn "No region was specified in knife.rb/config.rb or as an argument. The default region, us-east-1, will be used:"
       end
     end
 
diff --git a/lib/chef/knife/ec2_server_create.rb b/lib/chef/knife/ec2_server_create.rb
index 5145a0c0..9e8bfbb5 100644
--- a/lib/chef/knife/ec2_server_create.rb
+++ b/lib/chef/knife/ec2_server_create.rb
@@ -872,7 +872,7 @@ def validate!
         if Chef::Config[:knife].keys.include? :aws_ssh_key_id
           Chef::Config[:knife][:ssh_key_name] = Chef::Config[:knife][:aws_ssh_key_id] if !Chef::Config[:knife][:ssh_key_name]
           Chef::Config[:knife].delete(:aws_ssh_key_id)
-          ui.warn("Use of aws_ssh_key_id option in knife.rb config is deprecated, use ssh_key_name option instead.")
+          ui.warn("Use of aws_ssh_key_id option in knife.rb/config.rb config is deprecated, use ssh_key_name option instead.")
         end
 
         super([:image, :ssh_key_name, :aws_access_key_id, :aws_secret_access_key])
@@ -930,13 +930,13 @@ def validate!
         end
 
         if config[:security_groups] && config[:security_groups].class == String
-          ui.error("Invalid value type for knife[:security_groups] in knife configuration file (i.e knife.rb). Type should be array. e.g - knife[:security_groups] = ['sgroup1']")
+          ui.error("Invalid value type for knife[:security_groups] in knife configuration file (i.e knife.rb/config.rb). Type should be array. e.g - knife[:security_groups] = ['sgroup1']")
           exit 1
         end
 
-        # Validation for security_group_ids passed through knife.rb. It will raise error if values are not provided in Array.
+        # Validation for security_group_ids passed through knife.rb/config.rb. It will raise error if values are not provided in Array.
         if locate_config_value(:security_group_ids) && locate_config_value(:security_group_ids).class == String
-          ui.error("Invalid value type for knife[:security_group_ids] in knife configuration file (i.e knife.rb). Type should be array. e.g - knife[:security_group_ids] = ['sgroup1']")
+          ui.error("Invalid value type for knife[:security_group_ids] in knife configuration file (i.e knife.rb/config.rb). Type should be array. e.g - knife[:security_group_ids] = ['sgroup1']")
           exit 1
         end
 
diff --git a/lib/chef/knife/ec2_server_list.rb b/lib/chef/knife/ec2_server_list.rb
index f0ff26de..0ef584df 100644
--- a/lib/chef/knife/ec2_server_list.rb
+++ b/lib/chef/knife/ec2_server_list.rb
@@ -101,7 +101,7 @@ def run
         output_column_count = server_list.length
 
         if !config[:region] && Chef::Config[:knife][:region].nil?
-          ui.warn "No region was specified in knife.rb or as an argument. The default region, us-east-1, will be used:"
+          ui.warn "No region was specified in knife.rb/config.rb or as an argument. The default region, us-east-1, will be used:"
         end
 
         servers = connection.servers
diff --git a/spec/unit/ec2_ami_list_spec.rb b/spec/unit/ec2_ami_list_spec.rb
index 416baced..25b9072b 100644
--- a/spec/unit/ec2_ami_list_spec.rb
+++ b/spec/unit/ec2_ami_list_spec.rb
@@ -115,7 +115,7 @@
         ec2_servers = double()
         allow(ec2_connection).to receive(:describe_images).and_return(@describe_images_format)
         allow(knife_ec2_ami_list).to receive(:validate!)
-        expect(knife_ec2_ami_list.ui).to receive(:warn).with("No region was specified in knife.rb or as an argument. The default region, us-east-1, will be used:")
+        expect(knife_ec2_ami_list.ui).to receive(:warn).with("No region was specified in knife.rb/config.rb or as an argument. The default region, us-east-1, will be used:")
         knife_ec2_ami_list.run
       end
     end
diff --git a/spec/unit/ec2_flavor_list_spec.rb b/spec/unit/ec2_flavor_list_spec.rb
index 37df1e0d..89c4fff3 100644
--- a/spec/unit/ec2_flavor_list_spec.rb
+++ b/spec/unit/ec2_flavor_list_spec.rb
@@ -45,7 +45,7 @@
         ec2_flavors = double(sort_by: [])
         allow(ec2_connection).to receive(:flavors).and_return(ec2_flavors)
         allow(knife_flavor_list).to receive(:validate!)
-        expect(knife_flavor_list.ui).to receive(:warn).with("No region was specified in knife.rb or as an argument. The default region, us-east-1, will be used:")
+        expect(knife_flavor_list.ui).to receive(:warn).with("No region was specified in knife.rb/config.rb or as an argument. The default region, us-east-1, will be used:")
         knife_flavor_list.run
       end
     end
diff --git a/spec/unit/ec2_server_create_spec.rb b/spec/unit/ec2_server_create_spec.rb
index 9b96d280..456d987d 100644
--- a/spec/unit/ec2_server_create_spec.rb
+++ b/spec/unit/ec2_server_create_spec.rb
@@ -616,7 +616,7 @@
     end
 
     it "gives warning message and creates the attribute with the required name" do
-      expect(knife_ec2_create.ui).to receive(:warn).with("Use of aws_ssh_key_id option in knife.rb config is deprecated, use ssh_key_name option instead.")
+      expect(knife_ec2_create.ui).to receive(:warn).with("Use of aws_ssh_key_id option in knife.rb/config.rb config is deprecated, use ssh_key_name option instead.")
       knife_ec2_create.validate!
       expect(Chef::Config[:knife][:ssh_key_name]).to eq(@aws_key)
     end
@@ -631,7 +631,7 @@
     end
 
     it "gives warning message and gives preference to CLI value over knife config's value" do
-      expect(knife_ec2_create.ui).to receive(:warn).with("Use of aws_ssh_key_id option in knife.rb config is deprecated, use ssh_key_name option instead.")
+      expect(knife_ec2_create.ui).to receive(:warn).with("Use of aws_ssh_key_id option in knife.rb/config.rb config is deprecated, use ssh_key_name option instead.")
       knife_ec2_create.validate!
       expect(Chef::Config[:knife][:ssh_key_name]).to_not eq(@aws_key)
     end
diff --git a/spec/unit/ec2_server_list_spec.rb b/spec/unit/ec2_server_list_spec.rb
index b18ce283..fb6e80d1 100644
--- a/spec/unit/ec2_server_list_spec.rb
+++ b/spec/unit/ec2_server_list_spec.rb
@@ -40,7 +40,7 @@
         ec2_servers = double()
         allow(ec2_connection).to receive(:servers).and_return(ec2_servers)
         allow(knife_ec2_list).to receive(:validate!)
-        expect(knife_ec2_list.ui).to receive(:warn).with("No region was specified in knife.rb or as an argument. The default region, us-east-1, will be used:")
+        expect(knife_ec2_list.ui).to receive(:warn).with("No region was specified in knife.rb/config.rb or as an argument. The default region, us-east-1, will be used:")
         knife_ec2_list.run
       end
     end