Generat a Random MAC address
00:12:2F:22:32:16
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Use the following variation for FreeBSD:
openssl rand 6 | xxd -p | sed 's/\(..\)/\1:/g; s/:$//'16openssl rand -hex 6 | sed 's/\(..\)/\1:/g; s/.$//' -
Generate a random MAC address with capital letters
3hexdump -n6 -e '/1 ":%02X"' /dev/random|sed s/^://g -
2od -An -N10 -x /dev/random | md5sum | sed -r 's/^(.{10}).*$/\1/; s/([0-9a-f]{2})/\1:/g; s/:$//;'
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Just increase the 1 at the end if you want to generate more than one. (Alternative to "| head -n N" you could use the -b flag of od: -b $[6*N] Show Sample Output
2od /dev/urandom -w6 -tx1 -An|sed -e 's/ //' -e 's/ /:/g'|head -n 1 -
Generates labyrinth-like pattern on UTF-8 terminal in bash. For fun ;) Show Sample Output
2while ( true ) ; do if [ $(expr $RANDOM % 2 ) -eq 0 ] ; then echo -ne "\xE2\x95\xB1" ; else echo -ne "\xE2\x95\xB2" ; fi ; done
What do you think?
Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?
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MAC=`(date; cat /proc/interrupts) | md5sum | sed -r 's/^(.{12}).*$/\1/; s/([0-9a-f]{2})/\1:/g; s/:$//;'`