| One method to convert a text file to an image in Unix is to use a program in
the library NetPBM called
The documentation can be viewed here
For more complex operations, the page above says
"*pbmtext* is meant for small quantities of simple text. If you're working with a /document/, you would be better off using a document formatting program to "print" to a Postscript file, then feeding that Postscript to *pstopnm*."
A simple example is here:
pnmtojpeg test.pbm >test.jpg
or in one line