Capturing the motherboard's serial number (SN) using Dmidecode

The serial number (SN) that the vendor burns into the motherboard is unique and can be used as a unique index for a single server. The serial number of the server can be easily crawled by the Dmidecode command under Linux.
However, because of the various manufacturers of SMBIOS brush write specifications are not the same, we need to do some compatible operation.
A brief summary, see the table below

Manufacturers	General Crawl Method
Dell	Dmidecode-s System-serial-number
Hp	Dmidecode-s System-serial-number
Ibm	Dmidecode-s System-serial-number
Huawei	Dmidecode-s System-serial-number (Huawei Rack Server) or Dmidecode-s Baseboard-serial-number (Huawei Blades)

Use a shell to cover all models, as follows:

GET_SN () {        local mysn= ' dmidecode -s  system-serial-number | grep -v  ' # '         if  echo  "${MYSN}"  | grep -qiE  "^notspecified|^none|^tobefilledbyo.e.m.| O.E.M. "  ; then                     mysn= ' Dmidecode -s baseboard-serial-number '          fi         #对于RHEL4和CentOS4, Dmidecode does not support the-s parameter, Different SN acquisition methods are required         if grep -q  ' release 4 '    /etc/redhat-release ; then             mysn= ' dmidecode | grep -a5  ' system information '  | grep  ' Serial  number '  | awk  ' {PRINT&NBsp;$3} '  | sed  ' s/^[ \t]*//g '  | sed  ' s/[ \t]$//g '          fi            echo   $mySN         }

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Capturing the motherboard's serial number (SN) using Dmidecode