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--- fuss:jot [2013/10/19 05:54] – office
+++ fuss:jot [2025/10/21 23:26] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-===== Generating MAC Addresses =====
+====== Generating MAC Addresses ======
 <code bash>
@@ Line 5: / Line 5: @@
 </code>
-===== Print Sequences of Numbers =====
+====== Print Sequences of Numbers ======
 Input:
@@ Line 26: / Line 26: @@
 </code>
+====== Generate Unique Equal-Length Random Numbers =======
+To generate 1000 unique random numbers, issue:
+<code bash>
+jot -r 1000 0 65535 | uniq | xargs printf "%05d\n"
+</code>
+where the ''jot'' parameters mean:
+  * ''-r'' means generate random numbers,
+  * ''1000'' for 1000 random numbers,
+  * ''0'' the starting numbers,
+  * ''65535'' the ending random number
+The ''uniq'' command eliminates any duplicate random numbers. After that the ''barges'' command is used to pass the numbers to ''printf'' as parameter. The ''printf'' command then takes ''%05d\n'' as the formatting parameter meaning to print a 5-digit number all the time (for example, if ''jot'' generates the number ''1'', then ''printf'' makes sure to pre-pend zeros to obtain ''0001''.