Install ditaa by entering the following commands in the terminal:
sudo apt update sudo apt install ditaa
Description:
convert ASCII diagrams into proper bitmap graphics
DiTAA is a small command-line utility that can convert diagrams drawn using ASCII art ("drawings" that contain characters that resemble lines, like | / and -), into proper bitmap graphics. . DiTAA also uses special markup syntax to increase the possibilities of shapes and symbols that can be rendered.
Homepage: http://ditaa.sourceforge.net
Version: 0.10+ds1-1.1
Section: universe/graphics