diff --git a/src/main/java/io/nut/base/os/Beep.java b/src/main/java/io/nut/base/os/Beep.java
new file mode 100644
index 0000000..3f717b5
--- /dev/null
+++ b/src/main/java/io/nut/base/os/Beep.java
@@ -0,0 +1,80 @@
+/*
+ *  Beep.java
+ *
+ *  Copyright (c) 2022-2024 francitoshi@gmail.com
+ *-
+ *  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/>.
+ *
+ *  Report bugs or new features to: francitoshi@gmail.com
+ */
+package io.nut.base.os;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+/**
+ *
+ * @author franci
+ */
+public class Beep
+{
+    private static final String BEEP = "beep";
+    private static final Shell shellUtils = Shell.getInstance(OSName.os);
+
+    public static void beep()
+    {
+        try
+        {
+            String[] cmds = {BEEP};
+            shellUtils.doShellCommand(cmds, null, false, true);
+        }
+        catch (Exception ex)
+        {
+            Logger.getLogger(Beep.class.getName()).log(Level.SEVERE, null, ex);
+        }
+    }
+    public static void beep(double[] freq, int[] millis)
+    {
+        try
+        {
+            StringBuilder sb = new StringBuilder(BEEP);
+            for(int i=0;i<freq.length;i++)
+            {
+                if(i>0)
+                {
+                    sb.append(" -n");
+                }
+                sb.append(" -f ").append(freq[i]).append(" -l ").append(millis[i]);
+            }
+            String[] cmds = {sb.toString()};
+            shellUtils.doShellCommand(cmds, null, false, true);
+        }
+        catch (Exception ex)
+        {
+            Logger.getLogger(Beep.class.getName()).log(Level.SEVERE, null, ex);
+        }
+    }
+    public static void beep(int freq, int millis)
+    {
+        try
+        {
+            String[] cmds = {BEEP+" -f "+freq+" -l "+millis};
+            shellUtils.doShellCommand(cmds, null, false, true);
+        }
+        catch (Exception ex)
+        {
+            Logger.getLogger(Beep.class.getName()).log(Level.SEVERE, null, ex);
+        }
+    }
+}
diff --git a/src/main/java/io/nut/base/os/Shell.java b/src/main/java/io/nut/base/os/Shell.java
new file mode 100644
index 0000000..20378e7
--- /dev/null
+++ b/src/main/java/io/nut/base/os/Shell.java
@@ -0,0 +1,287 @@
+/*
+ *  Shell.java
+ *
+ *  Copyright (c) 2015-2024 francitoshi@gmail.com
+ *-
+ *  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/>.
+ *
+ *  Report bugs or new features to: francitoshi@gmail.com
+ */
+package io.nut.base.os;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.util.StringTokenizer;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+class AndroidShell extends Shell
+{
+    private static final Logger logger = Logger.getLogger(AndroidShell.class.getName());
+
+    @Override
+    public boolean isRootPossible()
+    {
+        try
+        {
+            // Check if Superuser.apk exists
+            File fileSU = new File("/system/app/Superuser.apk");
+            if (fileSU.exists())
+            {
+                return true;
+            }
+
+            fileSU = new File("/system/bin/su");
+            if (fileSU.exists())
+            {
+                return true;
+            }
+
+            //Check for 'su' binary
+            String[] cmd = { "which su" };
+            int exitCode = doShellCommand(null, cmd, new ShellCallback()
+            {
+                public void shellOut(String msg)
+                {
+                    //System.out.print(msg);
+                }
+                public void processComplete(int exitValue)
+                {
+                    // TODO Auto-generated method stub
+                }
+
+            }, false, true).exitValue();
+
+            if (exitCode == 0)
+            {
+                logger.log(Level.CONFIG, "Can acquire root permissions");
+                return true;
+            }
+        }
+        catch (IOException e)
+        {
+            //this means that there is no root to be had (normally) so we won't log anything
+            logger.log(Level.SEVERE, "Error checking for root access", e);
+        }
+        catch (Exception e)
+        {
+            logger.log(Level.SEVERE, "Error checking for root access", e);
+            //this means that there is no root to be had (normally)
+        }
+
+        logger.log(Level.SEVERE, "Could not acquire root permissions");
+
+        return false;
+    }
+}
+
+class PosixShell extends Shell
+{
+
+    @Override
+    public boolean isRootPossible()
+    {
+        return false;
+    }
+}
+
+public abstract class Shell
+{
+    private static final Logger logger = Logger.getLogger(Shell.class.getName());
+    //various console cmds
+    public final static String SHELL_CMD_CHMOD = "chmod";
+    public final static String SHELL_CMD_KILL = "kill -9";
+    public final static String SHELL_CMD_RM = "rm";
+    public final static String SHELL_CMD_PS = "ps";
+    public final static String SHELL_CMD_PIDOF = "pidof";
+
+    public final static String CHMOD_EXE_VALUE = "700";
+    
+    public interface ShellCallback
+    {
+        void shellOut(String shellLine);
+        void processComplete(int exitValue);
+    }
+
+    public static Shell getInstance(OSName osName)
+    {
+        if (osName.isAndroid())
+        {
+            return new AndroidShell();
+        }
+        return new PosixShell();
+    }
+
+    public final static Shell sh = getInstance(OSName.os);
+
+    public abstract boolean isRootPossible();
+
+    public int findProcessId(String command)
+    {
+        int procId = -1;
+
+        try
+        {
+            procId = findProcessIdWithPidOf(command);
+
+            if (procId == -1)
+            {
+                procId = findProcessIdWithPS(command);
+            }
+        }
+        catch (Exception ex)
+        {
+            try
+            {
+                procId = findProcessIdWithPS(command);
+            }
+            catch (Exception e2)
+            {
+                logger.log(Level.SEVERE, "Unable to get proc id for: " + command, e2);
+            }
+        }
+
+        return procId;
+    }
+
+    //use 'pidof' command
+    public int findProcessIdWithPidOf(String command) throws Exception
+    {
+        int procId = -1;
+
+        Runtime r = Runtime.getRuntime();
+
+        Process procPs;
+
+        String baseName = new File(command).getName();
+
+        //fix contributed my mikos on 2010.12.10
+        procPs = r.exec(new String[] { SHELL_CMD_PIDOF, baseName });
+        //procPs = r.exec(SHELL_CMD_PIDOF);
+
+        BufferedReader reader = new BufferedReader(new InputStreamReader(procPs.getInputStream()));
+        
+        String line;
+        while ((line = reader.readLine()) != null)
+        {
+            try
+            {
+                //this line should just be the process id
+                procId = Integer.parseInt(line.trim());
+                break;
+            }
+            catch (NumberFormatException e)
+            {
+                logger.log(Level.SEVERE, "unable to parse process pid: " + line, e);
+            }
+        }
+
+        return procId;
+    }
+
+    //use 'ps' command
+    public int findProcessIdWithPS(String command) throws Exception
+    {
+        int procId = -1;
+
+        Runtime r = Runtime.getRuntime();
+
+        Process procPs = r.exec(SHELL_CMD_PS);
+
+        BufferedReader reader = new BufferedReader(new InputStreamReader(procPs.getInputStream()));
+        String line;
+
+        while ((line = reader.readLine()) != null)
+        {
+            if (line.contains(' ' + command))
+            {
+
+                StringTokenizer st = new StringTokenizer(line, " ");
+                st.nextToken(); //proc owner
+
+                procId = Integer.parseInt(st.nextToken().trim());
+
+                break;
+            }
+        }
+        return procId;
+    }
+
+    public int doShellCommand(String[] cmds, ShellCallback sc, boolean runAsRoot, boolean waitFor) throws Exception
+    {
+        return doShellCommand(null, cmds, sc, runAsRoot, waitFor).exitValue();
+    }
+
+    public Process doShellCommand(Process proc, String[] cmds, ShellCallback sc, boolean runAsRoot, boolean waitFor) throws Exception
+    {
+        if (proc == null)
+        {
+            proc = Runtime.getRuntime().exec(runAsRoot ? "su" : "sh");
+        }
+
+        OutputStreamWriter out = new OutputStreamWriter(proc.getOutputStream());
+
+        for (String cmd : cmds)
+        {
+            logger.log(Level.CONFIG, "executing shell cmd: {0}; runAsRoot={1};waitFor={2}", new Object[]
+            {
+                cmd, runAsRoot, waitFor
+            });
+            out.write(cmd);
+            out.write("\n");
+        }
+
+        out.flush();
+        out.write("exit\n");
+        out.flush();
+
+        if (waitFor)
+        {
+            final char buf[] = new char[20];
+
+            // Consume the "stdout"
+            InputStreamReader reader = new InputStreamReader(proc.getInputStream());
+            int read = 0;
+            while ((read = reader.read(buf)) != -1)
+            {
+                if (sc != null)
+                {
+                    sc.shellOut(new String(buf));
+                }
+            }
+
+            // Consume the "stderr"
+            reader = new InputStreamReader(proc.getErrorStream());
+            read = 0;
+            while ((read = reader.read(buf)) != -1)
+            {
+                if (sc != null)
+                {
+                    sc.shellOut(new String(buf));
+                }
+            }
+            proc.waitFor();
+        }
+
+        if (sc != null)
+        {
+            sc.processComplete(proc.exitValue());
+        }
+
+        return proc;
+    }
+}
diff --git a/src/main/java/io/nut/base/util/Assert.java b/src/main/java/io/nut/base/util/Assert.java
index 142ade5..20b4c7d 100644
--- a/src/main/java/io/nut/base/util/Assert.java
+++ b/src/main/java/io/nut/base/util/Assert.java
@@ -1,4 +1,4 @@
-package io.tea.base.util;
+package io.nut.base.util;
 
 import java.lang.reflect.Array;
 import java.util.Arrays;