cat /sys/devices/virtual/dmi/id/board_asset_tag
#short hostname
hname=$(cat /sys/devices/virtual/dmi/id/board_asset_tag | awk '{print substr($0,5,15)}')
hostnamectl set-hostname $hname
Get aws ec2 instance id from shell/bash
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cat /sys/devices/virtual/dmi/id/board_asset_tag
#short hostname
hname=$(cat /sys/devices/virtual/dmi/id/board_asset_tag | awk '{print substr($0,5,15)}')
hostnamectl set-hostname $hname