My printer is the antiquated Brother DCP-7055. It also works as a scanner.
On Linux (azag), the scanner can be invoked with
scanme file.pdf
or other extensions, e.g., file.jpg, etc.
Also directly from the command line for higher resolution:
sudo scanimage --format=png > output.png
It also works well (with a GUI) with xsane or simple-scane although those require to be run as root (what xsane is very much against to do).