ただしdpkgは利用しない

方法

root@hostname:/home/shimizu# ohai packages | jq 'keys'
[
  "acl",
  "acpi",
  "acpi-support-base",
  "acpid",
  "adduser",
  "amap-align",
  "ant",
  "ant-optional",
  "antlr",
  "apache2",
  "apache2-bin",
  "apache2-data",
  "apache2-utils",
  "apt",
  "apt-file",
  "apt-show-versions",
  "apt-utils",
  "aptitude",
  "aptitude-common",
...

ohai

chefで内部的に使っているRubyライブラリ

root@hostname:/home/shimizu# gem install ohai
...

root@hostname:/home/shimizu# gem list | grep ohai
ohai (8.16.0)

root@hostname:/home/shimizu# ohai
{
  "network": {
    "interfaces": {
      "lo": {
        "mtu": "65536",
        "flags": [
...

root@hostname:/home/shimizu# ohai packages 
{
  "acl": {
    "version": "2.2.52-2"
  },
  "acpi": {
    "version": "1.7-1"
  },
  "acpi-support-base": {
    "version": "0.142-6"
  },
...

参考URL

koma
いい感じにサーバの構成情報を出力してくれるツール、ohaiを使ってみた