diff --git a/CloudKit/Docker/Commands.vb b/CloudKit/Docker/Commands.vb
index 9876454..d0b6331 100644
--- a/CloudKit/Docker/Commands.vb
+++ b/CloudKit/Docker/Commands.vb
@@ -1,43 +1,43 @@
 #Region "Microsoft.VisualBasic::8ea53b995fa2693902323f5b89829565, CloudKit\Docker\Commands.vb"
 
-    ' Author:
-    ' 
-    '       asuka (amethyst.asuka@gcmodeller.org)
-    '       xie (genetics@smrucc.org)
-    '       xieguigang (xie.guigang@live.com)
-    ' 
-    ' Copyright (c) 2018 GPL3 Licensed
-    ' 
-    ' 
-    ' GNU GENERAL PUBLIC LICENSE (GPL3)
-    ' 
-    ' 
-    ' This program is free software: you can redistribute it and/or modify
-    ' it under the terms of the GNU General Public License as published by
-    ' the Free Software Foundation, either version 3 of the License, or
-    ' (at your option) any later version.
-    ' 
-    ' This program is distributed in the hope that it will be useful,
-    ' but WITHOUT ANY WARRANTY; without even the implied warranty of
-    ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    ' GNU General Public License for more details.
-    ' 
-    ' You should have received a copy of the GNU General Public License
-    ' along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-
-
-    ' /********************************************************************************/
-
-    ' Summaries:
-
-    ' Module Commands
-    ' 
-    '     Function: CommandHistory, PS, Run, Search
-    ' 
-    '     Sub: [Stop]
-    ' 
-    ' /********************************************************************************/
+' Author:
+' 
+'       asuka (amethyst.asuka@gcmodeller.org)
+'       xie (genetics@smrucc.org)
+'       xieguigang (xie.guigang@live.com)
+' 
+' Copyright (c) 2018 GPL3 Licensed
+' 
+' 
+' GNU GENERAL PUBLIC LICENSE (GPL3)
+' 
+' 
+' This program is free software: you can redistribute it and/or modify
+' it under the terms of the GNU General Public License as published by
+' the Free Software Foundation, either version 3 of the License, or
+' (at your option) any later version.
+' 
+' This program is distributed in the hope that it will be useful,
+' but WITHOUT ANY WARRANTY; without even the implied warranty of
+' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+' GNU General Public License for more details.
+' 
+' You should have received a copy of the GNU General Public License
+' along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+
+' /********************************************************************************/
+
+' Summaries:
+
+' Module Commands
+' 
+'     Function: CommandHistory, PS, Run, Search
+' 
+'     Sub: [Stop]
+' 
+' /********************************************************************************/
 
 #End Region
 
@@ -45,6 +45,7 @@ Imports System.Runtime.CompilerServices
 Imports Darwinism.Docker.Arguments
 Imports Darwinism.Docker.Captures
 Imports Microsoft.VisualBasic.CommandLine.Reflection
+Imports Microsoft.VisualBasic.Language
 Imports Microsoft.VisualBasic.Scripting.MetaData
 Imports SMRUCC.Rsharp.Runtime.Interop
 
@@ -218,4 +219,24 @@ Public Module Commands
 
         Return powershell(cli)
     End Function
+
+    ''' <summary>
+    ''' delete docker images and related containers
+    ''' </summary>
+    ''' <returns></returns>
+    ''' 
+    <ExportAPI("rmImage")>
+    Public Function rmi(imageId As String) As Boolean
+        Dim stdout As Value(Of String) = ""
+        Dim containerId As String
+
+        Do While (stdout = CommandLine.Call("docker", $"rmi {imageId}")).Contains("image is being used by stopped container")
+            containerId = Strings.Split(Trim(stdout)).Last
+
+            Call CommandLine.Call("docker", $"rm {containerId}")
+            Call Console.WriteLine($"remove container {containerId}")
+        Loop
+
+        Return True
+    End Function
 End Module