how to find out what versions of maas maas-dns and maas-dhcp from terminal

Question

i would like to know how do you find out what version of maas is running on my ubuntu 14.4 installation

what command is used to find maas api version, maas-dns, maas dhcp. please be specific.

thanks

Answer 1

maas is managed by snap in modern versions of Ubuntu, so we can query with snap info:

snap info maas | awk '/^installed:/ {print $2}'

---

Older Ubuntu versions

apt-cache policy maas{,-dns,-dhcp} will tell you their packaged versions. You'll want to look at the Installed line. Here's a nice filtered version from a system not running any MAAS packages:

$ apt-cache policy maas{,-dns,-dhcp} | grep Installed -B1 -A1
maas:
  Installed: (none)
  Candidate: 1.5.1+bzr2269-0ubuntu0.1
--
maas-dns:
  Installed: (none)
  Candidate: 1.5.1+bzr2269-0ubuntu0.1
--
maas-dhcp:
  Installed: (none)
  Candidate: 1.5.1+bzr2269-0ubuntu0.1

The Candidates are what would be installed if I installed MAAS (or if it were already installed, what it would be upgraded to).

---

And just in case, the maas{,-dns,-dhcp} is a Bash expansion which gets replaced with maas maas-dns maas-dhcp when run. I was just being lazy and didn't want to type "maas" a load of times.