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--- pdftk_notes [2021/05/06 20:51] – [store a pdf without password] raju
+++ pdftk_notes [2023/08/14 21:34] – [replace a page with another pdf] raju
@@ Line 1: / Line 1: @@
+==== replace a page with another pdf ====
+To replace pg-16 of a pdf with another pdf. Assume that the later consists of only one single page.
+<code>
+pdftk A=initial.pdf B=insertAsPg16.pdf cat A1-15 B1 A17-end output final.pdf
+</code>
+Tested using
+<code>
+% pdftk --version
+pdftk 2.01 a Handy Tool for Manipulating PDF Documents
+Copyright (C) 2003-13, Sid Steward - Please Visit: www.pdftk.com
+This is free software; see the source code for copying conditions. There is
+NO warranty, not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+</code>
+==== rotate pages by 180 degrees ====
+<code>
+pdftk in.pdf cat 1-endsouth output out.pdf
+</code>
+Ref:- https://people.uleth.ca/~daniel.odonnell/blog/rotating-one-or-more-pages-in-a-pdf-in-linux - where I found the above solution.
 ==== store a pdf without password ====
 tags | remove password pdf
@@ Line 4: / Line 31: @@
 <code>
 qpdf --password=YOURPASSWORD --decrypt input.pdf output.pdf
+</code>
+If the password has some special characters, quote it.
+<code>
+qpdf --password="YOURPASSWORD" --decrypt input.pdf output.pdf
+</code>
+<code>
 pdftk secured.pdf input_pw YOURPASSWORD output unsecured.pdf
 </code>
@@ Line 11: / Line 45: @@
 Ref:- https://www.cyberciti.biz/faq/removing-password-from-pdf-on-linux/ - Mentions qpdf; gives more alternatives.
+==== encrypt a pdf with password ====
+<code>
+pdftk in.pdf output out.pdf user_pw foo
+</code>
+Ref:- http://askubuntu.com/questions/258848/is-there-a-tool-that-can-add-a-password-to-a-pdf-file
+Note:- I was unable to encrypt a pdf file using Adobe Reader X1 Version 11.0.13 . I could not find the "Tools pane" described in <nowiki>http://www.adobe.com/content/dam/Adobe/en/products/acrobat/pdfs/adobe-acrobat-xi-protect-pdf-file-with-permissions-tutorial-ue.pdf</nowiki>. I also tried File -> Properties -> Security after opening the file. However all the options in that window are greyed out. So I can't add a password from there as well. I was told that Adobe Standard can do this but it costs money whereas pdftk is free. In the end, using pdftk was a no brainer.
 ==== make two copies of the same document ====
@@ Line 18: / Line 61: @@
 See also: https://superuser.com/questions/600877/how-do-i-duplicate-pages-within-pdf-files-automatically - has a script to duplicate it by page (as in 1,1,2,2,...)
+==== debian package ====
+  * pdftk-java
+==== external links ====
+  * Enricon Zini talks about using pdfk and inkscape to add signatures to pdf documents - http://www.enricozini.org/blog/2016/pdftk-inkscape/