MATE – How to Install Minimal MATE DE from Network Boot mini.iso

As before x-tile package is located in the official PPA.

So we need to add PPA and install package from it:

sudo add-apt-repository ppa:giuspen/ppa
sudo apt-get update
sudo apt-get install x-tile

Then find it in Applications->Accessories->x-tile.

First of all I can't understand the trade-off of upgrading LTS to non-LTS.
LTS releases are highly recommended for real work. The non-LTS's 9 months support cycle is too short. Upgrading to non-LTS will result in 4 unneeded upgrades (18.04 LTS → 18.10 → 19.04 → 19.10 → 20.04 LTS) to next LTS.

TL;DR: but Ubuntu MATE upgrades normally with do-release-upgrade.

Below is a table for comparison for Ubuntu MATE:

|             Name           | Packages | max - min | upg.min - clean min |
|----------------------------+----------+-----------+---------------------|
| clean min UM 18.04.1       |  1678    |           |                     |
| upg.min UM 18.04.1 → 18.10 |  1715    |           |                     |
| max UM 18.04.1             |  1857    |    179    |                     |
| clean min UM 18.10         |  1598    |           |         117         |
| max UM 18.10               |  1826    |    228    |                     |

Legend:

• clean min UM 18.04.1 - clean installation of minimal Ubuntu MATE 18.04.1;
• upg.min UM 18.04.1 → 18.10 - clean installation of minimal Ubuntu MATE 18.04.1, upgraded to 18.10 with do-release-upgrade;
• max UM 18.04.1 - clean installation of normal Ubuntu MATE 18.04.1;
• clean min UM 18.10 - clean installation of minimal Ubuntu MATE 18.10;
• max UM 18.10 - clean installation of normal Ubuntu MATE 18.10.

The result: yes, number of installed packages differ by 117 packages. But if I compare the list of packages from clean 18.10 and upgraded - they differ mostly by the libraries. No heavy packages were installed. You can see the diff.