How do I set profile picture on Lubuntu?

The easiest method is to save your profile picture manually.

The steps are as follows:

  • Choose a picture you want to use.
  • Optionally you can create one - preferably with equal dimensions (a square).
  • Save the picture (in .PNG format) as ~/.face.

I'm new to Lubuntu (16.10) and here's how I did it:

  1. Start
  2. Under System Tools > select LightDM GTK + Greeting Settings
  3. Click on the default avartar icon at the bottom of the popup window to choose:
    • change icon, or
    • select file

I got my icons from flaticon.com (not in anyway affiliated, just a happy user).