1
 $  pdftk input.pdf cat 2-4 7 9-10 output output.pdf

Feb. 3, 2012, 6:50 a.m.mmaki

Explanation

pdftk is the PDF Toolkit

input.pdf is the input file.

cat 2-4 7 9-10 concatenate (combine) pages 2,3,4,7,9,10 of input.pdf.

output output.pdf the resulting pdf file containing the above pages.