You need to know the MAC address (eth0, for example). besides mac'if ifconfig produces a bunch of unnecessary garbage to me. I thought to isolate the conclusion of the regular, but I do not know how. That that found checked a line for compliance, but did not make search / preservation in an array.

  • So maybe not from ifconfig to take, but from cat / sys / class / net / * / address? - FeroxTL
  • Yes, thank you, it worked. - WhereColdWindsBlow

1 answer 1

although the ifconfig program is morally and physically outdated for management, diagnostic, and information purposes in operating systems that use the linux program as a kernel, I will give an example for it:

$ x=$(/sbin/ifconfig имя-интСрфСйса); x=${x#*HWaddr }; x=${x%% *}; echo $x 11:22:33:44:55:66

or, not "on pure bash":

 $ /sbin/ifconfig имя-интСрфСйса | awk '/HWaddr/ {print $5}') 11:22:33:44:55:66

and using the current ip program from the iproute2 software package , for example:

 $ x=$(ip -ol sh имя интСрфСйса); x=${x#*ether }; x=${x%% *}; echo $x 11:22:33:44:55:66

or, if the virtual sysfs file system is mounted, then it is even shorter:

 $ cat /sys/class/net/имя-интСрфСйса/address 11:22:33:44:55:66

for more information about shell parameter expansion in the bash program, see the documentation .