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+====== Database Statistics ======
+  * User accounts in the database:
+<code sql>
+SELECT COUNT(*) FROM UserAccounts;
+</code>
+  * Users logged-in at least once:
+<code sql>
+SELECT COUNT(*) FROM UserAccounts WHERE ServiceURLs NOT LIKE 'HomeURI= GatekeeperURI= InventoryServerURI= AssetServerURI=';
+</code>
+  * Number of regions:
+<code sql>
+SELECT COUNT(*) FROM regions;
+</code>
+====== Extract Password Hashes From Database Using MySQL ======
+The following command will extract first name, last name, ''UUID'' and their password hashes and salts from the database:
+<code sql>
+SELECT FirstName,LastName,auth.passwordHash,auth.passwordSalt FROM UserAccounts LEFT JOIN auth ON UserAccounts.PrincipalID=auth.UUID;
+</code>
+The returned output will be of the form:
+^ ''FirstName'' ^ ''LastName'' ^ ''passwordHash'' ^ ''passwordSalt'' ^
+| Taller     | Tempter   | a54c86d6fe5e88eff17bfc32461142cb | 8ce1fa1fba4eae5887942a8b5793f690 |
+====== Run System Command from OpenSim ======
+You can use C# in OpenSim by adding ''cs'' in ''OpenSim.ini'' to the list of allowed compilers:
+<code>
+AllowedCompilers = "lsl,cs"
+</code>
+Then, create an in-world script containing the following annotated code:
+<code csharp>
+//c#
+///////////////////////////////////////////////////////////////////////////
+//  Copyright (C) Wizardry and Steamworks 2011 - License: GNU GPLv3      //
+///////////////////////////////////////////////////////////////////////////
+public void default_event_touch_start(LSL_Types.LSLInteger num)
+{
+    System.Diagnostics.Process p = new System.Diagnostics.Process();
+    p.StartInfo.UseShellExecute = false;
+    // redirect standard output to retrive results
+    p.StartInfo.RedirectStandardOutput = true;
+    // this represents the name of the command
+    p.StartInfo.FileName = "ps";
+    // this represents the arguments passed to the commands
+    p.StartInfo.Arguments = "ax";
+    // start the process
+    p.Start();
+    // get the output of the command
+    LSL_Types.LSLString output = p.StandardOutput.ReadToEnd();
+    // wait for command termination (optional)
+    p.WaitForExit();
+    // say the output on local chat
+    llSay(0, output);
+}
+</code>
+which overrides the ''touch_start'' event and prints the output of ''ps ax'' on local chat.