Convert PDF files to plain text format.

# To convert filename.pdf to plain text and print it to standard output:
pdftotext <filename.pdf> -

# To convert filename.pdf to plain text and save it as filename.txt:
pdftotext <filename.pdf>

# To convert filename.pdf to plain text and preserve the layout:
pdftotext -layout <filename.pdf>

# To convert input.pdf to plain text and save it as output.txt:
pdftotext <input.pdf> <output.txt>

# To convert pages 2, 3 and 4 of input.pdf to plain text and save them as output.txt:
pdftotext -f <2> -l <4> <input.pdf> <output.txt>