Generate random valid mac addresses

macchanger -A (nic)

You have to install the package macchanger but this command will create a random mac from a list of known manufacturers. If you want to make a complete random mac, use the -r option .

By: pebkac

2010-12-07 20:22:54

Network bash mac

6 Alternatives + Submit Alt

Generate random valid mac addresses

Ruby version. Also, a perl version: perl -e 'printf("%.2x.",rand(255))for(1..5);printf("%.2x\n",rand(255))'
This is sample output - yours may be different.
3

ruby -e 'puts (1..6).map{"%0.2X"%rand(256)}.join(":")'

eightmillion · 2010-12-08 10:01:31 8
Generate random valid mac addresses

First set the variable $hexchars: hexchars="0123456789ABCDEF" Change the number in the first for loop if you need less then 1200 mac addresses Show Sample Output
This is sample output - yours may be different.
```
57:46:94:C4:2E:8C
81:03:BA:C0:69:F2
58:1D:AB:FE:BC:70
C6:1F:49:58:9B:94
17:6B:BF:8D:C5:E8
BA:0E:9A:0F:BA:B6
54:45:62:93:C3:46
2B:A8:0E:04:4E:39
47:3E:B0:63:72:AE
42:E9:EE:AA:EC:E7
76:B3:60:0F:B9:AA
C4:33:DB:6B:55:71
A1:CE:52:15:9B:4E
```
2

for i in {0..1200}; do for i in {1..12} ; do echo -n ${hexchars:$(( $RANDOM % 16 )):1} ; done | sed -e 's/$..$/:\1/g' | sed 's/.$.*$/\1/' ; echo; done

Raymii · 2010-12-04 16:44:11 5
Generate random valid mac addresses

Doubt it actually generates valid mac addresses but this version doesn't need any external commands so it runs much faster. Much shorter as well. Show Sample Output
This is sample output - yours may be different.
```
7A:F1:83:0F:F0:67
```
2

h=0123456789ABCDEF;for c in {1..12};do echo -n ${h:$(($RANDOM%16)):1};if [[ $((c%2)) = 0 && $c != 12 ]];then echo -n :;fi;done;echo

dabom · 2010-12-05 01:35:03 4
Generate random valid mac addresses

Shorter and more straightforward. Also in perl: perl -e 'print join(":", map { sprintf "%0.2X",rand(256) }(1..6))."\n"'
This is sample output - yours may be different.
2

for i in {1..6}; do printf "%0.2X:" $[ $RANDOM % 0x100 ]; done | sed 's/:$/\n/'

forcefsck · 2010-12-07 19:26:58 5
Generate random valid mac addresses

Python Alternative Show Sample Output
This is sample output - yours may be different.
```
2a:27:2a:1d:22:0a
37:3d:c9:c8:09:97
...
```
1

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))])"

ohe · 2010-12-08 11:02:16 6

What Others Think

rahimhh21 · 119 weeks and 2 days ago

Perfecthomepugs · 110 weeks and 2 days ago

pugpuppies95 · 72 weeks and 4 days ago

yeneba6574 · 27 weeks and 2 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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