pamfile: add page (#10893)

* pamfile: add file

* Update pages/common/pamfile.md

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

* Update pages/common/pamfile.md

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

---------

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

pages/common/pamfile.md

@@ -0,0 +1,16 @@
+# pamfile
+
+> Describe Netpbm (PAM or PNM) files.
+> More information: <https://netpbm.sourceforge.net/doc/pamfile.html>.
+
+- Describe the specified Netpbm files:
+
+`pamfile {{path/to/file1 path/to/file2 ...}}`
+
+- Describe every image in each input file (as opposed to only the first image in each file) in a machine-readable format:
+
+`pamfile -allimages -machine {{path/to/file}}`
+
+- Display a count on how many images the input files contain:
+
+`pamfile -count {{path/to/file}}`