diff --git a/ShiftOS.Frontend/Apps/Terminal.cs b/ShiftOS.Frontend/Apps/Terminal.cs
index 343bb5d..0621139 100644
--- a/ShiftOS.Frontend/Apps/Terminal.cs
+++ b/ShiftOS.Frontend/Apps/Terminal.cs
@@ -199,7 +199,7 @@ namespace ShiftOS.Frontend.Apps
 
         protected override void OnKeyEvent(KeyEvent a)
         {
-            if(a.ControlDown && (a.Key == Keys.OemPlus || a.Key == Keys.Add))
+            if (a.ControlDown && (a.Key == Keys.OemPlus || a.Key == Keys.Add))
             {
                 _zoomFactor *= 2;
                 RecalculateLayout();
@@ -209,7 +209,7 @@ namespace ShiftOS.Frontend.Apps
 
             if (a.ControlDown && (a.Key == Keys.OemMinus || a.Key == Keys.Subtract))
             {
-                _zoomFactor = Math.Max(1, _zoomFactor/2);
+                _zoomFactor = Math.Max(1, _zoomFactor / 2);
                 RecalculateLayout();
                 Invalidate();
                 return;
@@ -221,7 +221,7 @@ namespace ShiftOS.Frontend.Apps
                 if (!PerformTerminalBehaviours)
                 {
                     Text = Text.Insert(Index, Environment.NewLine);
-                    Index+=2;
+                    Index += 2;
                     RecalculateLayout();
                     Invalidate();
                     return;
@@ -239,12 +239,12 @@ namespace ShiftOS.Frontend.Apps
                     var text2 = text[text.Length - 1];
                     var text3 = "";
                     var text4 = Regex.Replace(text2, @"\t|\n|\r", "");
-                        WriteLine("");
+                    WriteLine("");
 
-                        if (TerminalBackend.PrefixEnabled)
-                        {
-                            text3 = text4.Remove(0, $"{SaveSystem.CurrentSave.Username}@{SaveSystem.CurrentSave.SystemName}:~$ ".Length);
-                        }
+                    if (TerminalBackend.PrefixEnabled)
+                    {
+                        text3 = text4.Remove(0, TerminalBackend.ShellOverride.Length);
+                    }
                     if (!string.IsNullOrWhiteSpace(text3))
                     {
                         TerminalBackend.LastCommand = text3;
@@ -288,7 +288,7 @@ namespace ShiftOS.Frontend.Apps
                     {
                         var tostring3 = Lines[Lines.Length - 1];
                         var tostringlen = tostring3.Length + 1;
-                        var workaround = $"{SaveSystem.CurrentSave.Username}@{SaveSystem.CurrentSave.SystemName}:~$ ";
+                        var workaround = TerminalBackend.ShellOverride;
                         var derp = workaround.Length + 1;
                         if (tostringlen != derp)
                         {
@@ -310,9 +310,9 @@ namespace ShiftOS.Frontend.Apps
                     Debug.WriteLine("Drunky alert in terminal.");
                 }
             }
-            else if(a.Key == Keys.Right)
+            else if (a.Key == Keys.Right)
             {
-                if(Index < Text.Length)
+                if (Index < Text.Length)
                 {
                     Index++;
                     AppearanceManager.CurrentPosition++;
@@ -326,7 +326,7 @@ namespace ShiftOS.Frontend.Apps
                 {
                     var getstring = Lines[Lines.Length - 1];
                     var stringlen = getstring.Length + 1;
-                    var header = $"{SaveSystem.CurrentSave.Username}@{SaveSystem.CurrentSave.SystemName}:~$ ";
+                    var header = TerminalBackend.ShellOverride;
                     var headerlen = header.Length + 1;
                     var selstart = Index;
                     var remstrlen = Text.Length - stringlen;
@@ -343,7 +343,7 @@ namespace ShiftOS.Frontend.Apps
             else if (a.Key == Keys.Up && PerformTerminalBehaviours)
             {
                 var tostring3 = Lines[Lines.Length - 1];
-                if (tostring3 == $"{SaveSystem.CurrentSave.Username}@{SaveSystem.CurrentSave.SystemName}:~$ ")
+                if (tostring3 == TerminalBackend.ShellOverride)
                     Console.Write(TerminalBackend.LastCommand);
                 ConsoleEx.OnFlush?.Invoke();
                 return;
@@ -360,7 +360,7 @@ namespace ShiftOS.Frontend.Apps
                     Text = Text.Insert(Index, a.KeyChar.ToString());
                     Index++;
                     AppearanceManager.CurrentPosition++;
-//                    RecalculateLayout();
+                    //                    RecalculateLayout();
                     InvalidateTopLevel();
                 }
             }
diff --git a/ShiftOS.Frontend/Commands.cs b/ShiftOS.Frontend/Commands.cs
index 012d0b0..d21e8a9 100644
--- a/ShiftOS.Frontend/Commands.cs
+++ b/ShiftOS.Frontend/Commands.cs
@@ -152,7 +152,8 @@ namespace ShiftOS.Frontend
             }
         }
 
-        [Command("commands", "", "{DESC_COMMANDS}")]
+        [MetaCommand]
+        [Command("help", "", "{DESC_COMMANDS}")]
         public static bool Commands()
         {
             var sb = new StringBuilder();
@@ -160,7 +161,7 @@ namespace ShiftOS.Frontend
             sb.AppendLine("=================");
             sb.AppendLine();
             //print all unique namespaces.
-            foreach (var n in TerminalBackend.Commands.Where(x => !(x is TerminalBackend.WinOpenCommand) && Shiftorium.UpgradeInstalled(x.Dependencies) && x.CommandInfo.hide == false).OrderBy(x => x.CommandInfo.name))
+            foreach (var n in TerminalBackend.Commands.Where(x => !(x is TerminalBackend.WinOpenCommand) && Shiftorium.UpgradeInstalled(x.Dependencies) && x.CommandInfo.hide == false && x.MatchShell() == true).OrderBy(x => x.CommandInfo.name))
             {
                 sb.Append(" - " + n.CommandInfo.name);
                 if (!string.IsNullOrWhiteSpace(n.CommandInfo.description))
@@ -174,13 +175,6 @@ namespace ShiftOS.Frontend
             return true;
         }
 
-        [Command("help", description = "{DESC_HELP}")]
-        public static bool Help()
-        {
-            Commands();
-            WindowCommands.Programs();
-            return true;
-        }
 
 
         [MultiplayerOnly]
diff --git a/ShiftOS_TheReturn/TerminalBackend.cs b/ShiftOS_TheReturn/TerminalBackend.cs
index 689465f..dcc4625 100644
--- a/ShiftOS_TheReturn/TerminalBackend.cs
+++ b/ShiftOS_TheReturn/TerminalBackend.cs
@@ -40,6 +40,29 @@ namespace ShiftOS.Engine
     /// </summary>
     public static class TerminalBackend
     {
+        private static string _shellOverrideString = "";
+
+        
+        /// <summary>
+        /// Gets the current shell prompt override string.
+        /// </summary>
+        public static string ShellOverride
+        {
+            get
+            {
+                return (string.IsNullOrWhiteSpace(_shellOverrideString) || SaveSystem.CurrentSave == null) ? $"{SaveSystem.CurrentSave.Username}@{SaveSystem.CurrentSave.SystemName}:~$ " : _shellOverrideString;
+            }
+        }
+
+        /// <summary>
+        /// Sets the shell override string to the specified value. Empty string or <see cref="null"/> to use the default ShiftOS string. 
+        /// </summary>
+        /// <param name="value">The string to use as a shell prompt.</param>
+        public static void SetShellOverride(string value)
+        {
+            _shellOverrideString = value;
+        }
+
         /// <summary>
         /// Occurs when a command is processed.
         /// </summary>
@@ -133,6 +156,17 @@ namespace ShiftOS.Engine
 
         public class TerminalCommand
         {
+            public virtual bool MatchShell()
+            {
+                if(ShellMatch != "metacmd")
+                {
+                    return (ShellMatch == _shellOverrideString);
+                }
+                return true;
+            }
+
+            public string ShellMatch { get; set; }
+
             public override int GetHashCode()
             {
                 int hash = 0;
@@ -178,11 +212,19 @@ namespace ShiftOS.Engine
             public virtual void Invoke(Dictionary<string, object> args)
             {
                 List<string> errors = new List<string>();
+                if (ShellMatch != "metacmd")
+                {
+                    if (ShellMatch != TerminalBackend._shellOverrideString)
+                    {
+                        errors.Add("Command not found.");
+                    }
+                }
+                
                 if (errors.Count > 0)
                 {
                     foreach (var error in errors)
                     {
-                        Console.WriteLine("Command error: " + error);
+                        Console.WriteLine(error);
                     }
                     return;
                 }
@@ -197,10 +239,28 @@ namespace ShiftOS.Engine
             }
         }
 
+        [MetaCommand]
+        [Command("exit")]
+        public static void Exit()
+        {
+            if (_shellOverrideString != "")
+                _shellOverrideString = "";
+            else
+            {
+                Console.WriteLine("error: cannot exit system shell");
+            }
+        }
+
+
         public class WinOpenCommand : TerminalCommand
         {
             public Type ShiftOSWindow { get; set; }
 
+            public override bool MatchShell()
+            {
+                return (_shellOverrideString == "");
+            }
+
 
             public override void Invoke(Dictionary<string, object> args)
             {
@@ -296,6 +356,13 @@ namespace ShiftOS.Engine
                         var tc = new TerminalCommand();
                         tc.RequiresElevation = !(type.GetCustomAttributes(false).FirstOrDefault(x => x is KernelModeAttribute) == null);
 
+                        var shellConstraint = mth.GetCustomAttributes(false).FirstOrDefault(x => x is ShellConstraintAttribute) as ShellConstraintAttribute;
+                        tc.ShellMatch = (shellConstraint == null) ? "" : shellConstraint.Shell;
+
+                        if(mth.GetCustomAttributes(false).FirstOrDefault(x=>x is MetaCommandAttribute) != null)
+                        {
+                            tc.ShellMatch = "metacmd";
+                        }
 
                         tc.CommandInfo = cmd as Command;
                         tc.RequiresElevation = tc.RequiresElevation || !(mth.GetCustomAttributes(false).FirstOrDefault(x => x is KernelModeAttribute) == null);
@@ -471,42 +538,23 @@ namespace ShiftOS.Engine
             return true;
         }
 
+#if DEBUG
+        [Command("setshell", hide = true)]
+        [RequiresArgument("id")]
+        public static void Debug_SetShellOverrideCMD(Dictionary<string, object> args)
+        {
+            SetShellOverride(args["id"].ToString());
+        }
+#endif
+
         /// <summary>
         /// Prints the user prompt to the terminal.
         /// </summary>
         public static void PrintPrompt()
         {
-            if (SaveSystem.CurrentSave != null)
+            if (PrefixEnabled)
             {
-                    ConsoleEx.BackgroundColor = SkinEngine.LoadedSkin.TerminalBackColorCC;
-                    ConsoleEx.Italic = false;
-                    ConsoleEx.Underline = false;
-
-                    ConsoleEx.ForegroundColor = ConsoleColor.Magenta;
-                    ConsoleEx.Bold = true;
-
-                    Console.Write(SaveSystem.CurrentSave.Username);
-                    ConsoleEx.Bold = false;
-                    ConsoleEx.ForegroundColor = ConsoleColor.Gray;
-                    Console.Write("@");
-                    ConsoleEx.Italic = true;
-                    ConsoleEx.Bold = true;
-                    ConsoleEx.ForegroundColor = ConsoleColor.Yellow;
-                    Console.Write(SaveSystem.CurrentSave.SystemName);
-                    ConsoleEx.Italic = false;
-                    ConsoleEx.Bold = false;
-                    ConsoleEx.ForegroundColor = ConsoleColor.Gray;
-                    Console.Write(":~");
-                    Console.ForegroundColor = ConsoleColor.White;
-                    ConsoleEx.Italic = true;
-                    if (KernelWatchdog.InKernelMode == true)
-                        Console.Write("#");
-                    else
-                        Console.Write("$");
-                    ConsoleEx.Italic = false;
-                    ConsoleEx.Bold = false;
-                    ConsoleEx.ForegroundColor = SkinEngine.LoadedSkin.TerminalForeColorCC;
-                    Console.Write(" ");
+                Console.Write(ShellOverride);
                 ConsoleEx.Flush();
             }
         }
@@ -536,4 +584,32 @@ namespace ShiftOS.Engine
         }
 
     }
+
+    /// <summary>
+    /// Marks this command so that it can be run in ANY shell.
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]
+    public class MetaCommandAttribute : Attribute
+    {
+
+    }
+
+    [AttributeUsage(AttributeTargets.Method, AllowMultiple = false)]
+    public class ShellConstraintAttribute : Attribute
+    {
+        /// <summary>
+        /// Instructs the terminal command interpreter to disallow running of this command unless the user shell override matches up with the value provided here.
+        /// </summary>
+        /// <param name="shell">The required shell string. Null or whitespace to match with the default ShiftOS shell.</param>
+        public ShellConstraintAttribute(string shell)
+        {
+            Shell = shell;
+        }
+
+
+        /// <summary>
+        /// Gets the required shell string for the command.
+        /// </summary>
+        public string Shell { get; private set; }
+    }
 }