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Raspberry Piの固有ID

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Raspberry Piの固有IDについて、調べた。

/proc/cpuinfoにあるので、catで表示する。

# cat /proc/cpuinfo
processor       : 0
model name      : ARMv7 Processor rev 4 (v7l)
BogoMIPS        : 38.40
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xd03
CPU revision    : 4

processor       : 1
model name      : ARMv7 Processor rev 4 (v7l)
BogoMIPS        : 38.40
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xd03
CPU revision    : 4

processor       : 2
model name      : ARMv7 Processor rev 4 (v7l)
BogoMIPS        : 38.40
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xd03
CPU revision    : 4

processor       : 3
model name      : ARMv7 Processor rev 4 (v7l)
BogoMIPS        : 38.40
Features        : half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32 
CPU implementer : 0x41
CPU architecture: 7
CPU variant     : 0x0
CPU part        : 0xd03
CPU revision    : 4

Hardware        : BCM2835
Revision        : a02082
Serial          : 00000000de876543

最後のSerialがシリアル番号になる。
スクリプトなどで使用する場合は、

# grep Serial /proc/cpuinfo|awk '{print $3}'

00000000de876543

で番号のみを取り出せばよい。

また、eth0のMACアドレスは、OSでベンダー番号(b8:27:eb)+シリアルで振っているようなので

# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.1.3  netmask 255.255.255.0  broadcast 192.168.1.255
        ether b8:27:eb:87:65:43  txqueuelen 1000  (イーサネット)
        RX packets 2194421  bytes 283335546 (270.2 MiB)
        RX errors 0  dropped 1632266  overruns 0  frame 0
        TX packets 116143  bytes 26260222 (25.0 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

のether部分も固有IDとなるかと思う。

これも

# ifconfig eth0|grep ether|awk '{print $2}'|sed "s/://g"
b827eb876543 

でhexのみを取り出す。

参考:
https://raspberrypi.akaneiro.jp/archives/413
http://boysenberrypi.hatenadiary.jp/entry/2014/03/29/222028

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