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Where can I find the serial number of the Raspberry Pi I am currently using?

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is the serial number printed on the device or is it only available through software? I see there is a sticker on the device but I don't think that it is related to the serial number. It would be nice to know the ID of the device without having to power it on and connect it. –  Scoop Oct 4 '12 at 21:54
1  
@AlexisK It's only available in software. –  Alex Chamberlain Oct 8 '12 at 10:21
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5 Answers 5

up vote 11 down vote accepted

The serial number can be found in /proc/cpuinfo; for example,

 pi@raspberrypi:~$ cat /proc/cpuinfo
 Processor       : ARMv6-compatible processor rev 7 (v6l)
 BogoMIPS        : 697.95
 Features        : swp half thumb fastmult vfp edsp java tls
 CPU implementer : 0x41
 CPU architecture: 7
 CPU variant     : 0x0
 CPU part        : 0xb76
 CPU revision    : 7

 Hardware        : BCM2708
 Revision        : 1000002
 Serial          : 000000000000000d

Bash/Perl

In Bash, it is very simple to extract... by using Perl. Use

cat /proc/cpuinfo | perl -n -e '/^Serial[ ]*: ([0-9a-f]{16})$/ && print "$1\n"'

For example,

$ cat cpuinfo | perl -n -e '/^Serial[ ]*: ([0-9a-f]{16})$/ && print "$1\n"'
000000000000000d

Python

Raspberry Spy provide a very useful Python example.

def getserial():
  # Extract serial from cpuinfo file
  cpuserial = "0000000000000000"
  try:
    f = open('/proc/cpuinfo','r')
    for line in f:
      if line[0:6]=='Serial':
        cpuserial = line[10:26]
    f.close()
  except:
    cpuserial = "ERROR000000000"

  return cpuserial

References

  1. Licence key product pages
  2. Raspberry Spy: Getting Your Raspberry Pi Serial Number Using Python
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Perl will accept filenames as arguments. It's not necessary to use cat. –  Dennis Williamson Oct 4 '12 at 21:18
    
the last 6 digits of my serial number are the same as the last 6 digits of my MAC address. Is this true for you? –  Scoop Oct 4 '12 at 21:51
    
@AlexisK: It's true for me. –  Dennis Williamson Oct 4 '12 at 23:52
1  
< redirection also works, so it's a useless use of cat. –  XTL Oct 5 '12 at 6:21
    
@XTL I prefer to use pipes than input redirection; it flows nicely. Just personal preference. –  Alex Chamberlain Oct 5 '12 at 6:30
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Bash/Grep

Using grep:

grep -Po '^Serial\s*:\s*\K[[:xdigit:]]{16}' /proc/cpuinfo

Bash

Using pure Bash without using any external utilities:

pattern='^Serial.*([[:xdigit:]]{16})$'
while read -r line
do
    if [[ $line =~ $pattern ]]
    then
        echo "${BASH_REMATCH[1]}"
    fi
done < /proc/cpuinfo

The output of either of the above is the same.

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this is the only one that worked for me –  cwd Mar 26 at 19:36
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Bash/Awk

Since this turned out to be some kind of "how many ways can you get the serial" here is the awk version

  awk '/^Serial\s*:\s/{print $3}' /proc/cpuinfo
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cat /proc/cpuinfo | grep Serial | awk ' {print $3}'

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grep -i serial /proc/cpuinfo | cut -d : -f2
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programming golf is not encouraged on the web-site, because it's very difficult to follow your answer for beginners, especially if you don't write any explanation or detailed comment. –  lenik May 10 at 8:03
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