diff --git a/diagrams/generic/os.py b/diagrams/generic/os.py
index 695f29545..98099eb05 100644
--- a/diagrams/generic/os.py
+++ b/diagrams/generic/os.py
@@ -16,6 +16,10 @@ class Centos(_Os):
     _icon = "centos.png"
 
 
+class Debian(_Os):
+    _icon = "debian.png"
+
+
 class IOS(_Os):
     _icon = "ios.png"
 
diff --git a/diagrams/ibm/network.py b/diagrams/ibm/network.py
index 956d4cfa8..605319d1f 100644
--- a/diagrams/ibm/network.py
+++ b/diagrams/ibm/network.py
@@ -93,19 +93,3 @@ class VpnPolicy(_Network):
 
 
 # Aliases
-
-ACL = Rules
-CIS = InternetServices
-DL = DirectLink
-FIP = FloatingIp
-FloatingIP = FloatingIp
-FW = Firewall
-LB = LoadBalancer
-NLB = LoadBalancer 
-PublicGateway = Gateway
-SecurityGroupRules = Rules
-TG = TransitGateway
-VPC = Vpc
-VPNGateway = VpnGateway
-VPNConnection = VpnConnection
-VPNPolicy = VpnPolicy
diff --git a/diagrams/ibm/security.py b/diagrams/ibm/security.py
index 79486b8fa..ba35efd59 100644
--- a/diagrams/ibm/security.py
+++ b/diagrams/ibm/security.py
@@ -65,4 +65,3 @@ class Vpn(_Security):
 
 
 # Aliases
-VPN = Vpn
diff --git a/docs/nodes/generic.md b/docs/nodes/generic.md
index 8e4249a14..74c7deb1e 100644
--- a/docs/nodes/generic.md
+++ b/docs/nodes/generic.md
@@ -34,6 +34,7 @@ Node classes list of generic provider.
 
 - **diagrams.generic.os.Android**
 - **diagrams.generic.os.Centos**
+- **diagrams.generic.os.Debian**
 - **diagrams.generic.os.IOS**
 - **diagrams.generic.os.LinuxGeneral**
 - **diagrams.generic.os.Suse**
diff --git a/resources/generic/os/debian.png b/resources/generic/os/debian.png
new file mode 100644
index 000000000..232a02641
Binary files /dev/null and b/resources/generic/os/debian.png differ
diff --git a/resources/ibm/compute/Instance.png b/resources/ibm/compute/instance.png
similarity index 100%
rename from resources/ibm/compute/Instance.png
rename to resources/ibm/compute/instance.png
diff --git a/resources/ibm/compute/Key.png b/resources/ibm/compute/key.png
similarity index 100%
rename from resources/ibm/compute/Key.png
rename to resources/ibm/compute/key.png
diff --git a/resources/ibm/general/Enterprise.png b/resources/ibm/general/enterprise.png
similarity index 100%
rename from resources/ibm/general/Enterprise.png
rename to resources/ibm/general/enterprise.png
diff --git a/resources/ibm/general/Internet.png b/resources/ibm/general/internet.png
similarity index 100%
rename from resources/ibm/general/Internet.png
rename to resources/ibm/general/internet.png
diff --git a/resources/ibm/network/Bridge.png b/resources/ibm/network/bridge.png
similarity index 100%
rename from resources/ibm/network/Bridge.png
rename to resources/ibm/network/bridge.png
diff --git a/resources/ibm/network/Enterprise.png b/resources/ibm/network/enterprise.png
similarity index 100%
rename from resources/ibm/network/Enterprise.png
rename to resources/ibm/network/enterprise.png
diff --git a/resources/ibm/network/Firewall.png b/resources/ibm/network/firewall.png
similarity index 100%
rename from resources/ibm/network/Firewall.png
rename to resources/ibm/network/firewall.png
diff --git a/resources/ibm/network/Gateway.png b/resources/ibm/network/gateway.png
similarity index 100%
rename from resources/ibm/network/Gateway.png
rename to resources/ibm/network/gateway.png
diff --git a/resources/ibm/network/Region.png b/resources/ibm/network/region.png
similarity index 100%
rename from resources/ibm/network/Region.png
rename to resources/ibm/network/region.png
diff --git a/resources/ibm/network/Router.png b/resources/ibm/network/router.png
similarity index 100%
rename from resources/ibm/network/Router.png
rename to resources/ibm/network/router.png
diff --git a/resources/ibm/network/Rules.png b/resources/ibm/network/rules.png
similarity index 100%
rename from resources/ibm/network/Rules.png
rename to resources/ibm/network/rules.png
diff --git a/resources/ibm/network/Subnet.png b/resources/ibm/network/subnet.png
similarity index 100%
rename from resources/ibm/network/Subnet.png
rename to resources/ibm/network/subnet.png
diff --git a/resources/ibm/network/VPC.png b/resources/ibm/network/vpc.png
similarity index 100%
rename from resources/ibm/network/VPC.png
rename to resources/ibm/network/vpc.png