Several methods of randomly generating MAC address

First, Shell generation method

Shell-generated methods are the most, but also feel the most simple and efficient, here are several common tools to generate random methods:

OpenSSL tool generation

The code is as follows	Copy Code
yang@crunchbang:~$ OpenSSL Rand-hex 6 | Sed ' s/(..) /1:/g; s/.$//' a0:77:d4:ef:08:7d yang@crunchbang:~$ OpenSSL Rand 6 | Xxd-p | Sed ' s/(..) /1:/g; s/:$//' 3b:7f:95:c8:39:6d

OD generation

The code is as follows	Copy Code
yang@crunchbang:~$ Od-an-n10-x/dev/random | md5sum | Sed-r ' s/^ (. { 10}). *$/1/; s/([0-9a-f]{2})/1:/g; s/:$//; ' B0:85:1a:41:b1 yang@crunchbang:~$ yang@crunchbang:~$ od/dev/urandom-w6-tx1-an|sed-e ' s///'-E ' s//:/g ' |head-n 1 D8:d3:67:20:c5:f2

For Loop generation

The code is as follows	Copy Code
yang@crunchbang:~$ for I in {1..6}; Do printf "%0.2x:" $[$RANDOM% 0x100]; Done | Sed ' s/:$/n/' 8e:9e:fb:ae:ff:d2 yang@crunchbang:~$ h=0123456789abcdef;for C in {1..12};d o echo-n ${h:$ (($RANDOM%16)): 1};if [[$ ((c%2)) = 0 && $c !=]];then echo-n:; fi;done;echo 19:7f:a9:41:e2:20

Here again, the language itself is not high and low, do not despise the Shell,shell can realize why must use Perl, Python, PHP and so on to achieve.

Second, Perl generation method

The code is as follows	Copy Code
yang@crunchbang:~$ perl-e ' printf ("%.2X:", rand (255)) for (1..5);p rintf ("%.2xn", rand (255)) ' F8:42:c1:d4:a8:28 yang@crunchbang:~$ perl-e ' Print join (":", Map {sprintf "%0.2x", Rand (256)} (1..6)). " N "' A7:02:bd:bc:59:e2

The power and simplicity of Perl are indisputable.

Three, Ruby generation method

The code is as follows	Copy Code
yang@crunchbang:~$ ruby-e ' puts (1..6) map{"%0.2x"%rand (256)}.join (":") Cd:97:ed:52:b7:f4

The method used here is almost the same as in Perl.

Four, Python generation method

The code is as follows	Copy Code
yang@crunchbang:~$ python-c "from itertools import IMAP; from random import randint; print ': '. Join (['%02x '%x for x in IMAP (Lambda X:randint (0,255), Range (6))]) " 52:75:80:68:3a:cc

A Python script is also given at the official site of CentOS and Redhat:

The code is as follows	Copy Code
#!/usr/bin/python # macgen.py script to generate a MAC address for Red Hat virtualization guests # Import Random # Def randommac (): Mac = [0x00, 0x16, 0x3e, Random.randint (0x00, 0x7f), Random.randint (0x00, 0xFF), Random.randint (0x00, 0xFF)] Return ': '. Join (Map (lambda x: "%02x"% x, Mac)) # Print Randommac ()

When you have a virtinst.util module, you can also use the following simple statement to generate a new Mac and UUID:

code is as follows	copy code
#!/usr/bin /env python # -*-mode:python;-*- print " print" New UUID: " Import virtinst.util; Print virtinst.util.uuidToString (Virtinst.util.randomUUID ()) print "New MAC:" Import virtinst.util; Print Virtinst.util.randomMAC () print ""