Printing or saving the first page (or specific pages) of pdf in Linux

Install pdftk using:

sudo apt-get install pdftk
or
sudo snap install pdftk


and use:

To save only the first page (in the terminal):

pdftk fileName.pdf cat 10-12 output outfile_p10-12.pdf

To save the first page:

pdftk fileName.pdf cat 1-1 output outfile_p1.pdf