pdftk の使い方

Ubuntu 25.04 でのインストール

sudo apt install pdftk

インストールの確認

$ pdftk --version
pdftk port to java 3.3.3 a Handy Tool for Manipulating PDF Documents
Copyright (c) 2017-2018 Marc Vinyals - https://gitlab.com/pdftk-java/pdftk
Copyright (c) 2003-2013 Steward and Lee, LLC.
pdftk includes a modified version of the iText library.
Copyright (c) 1999-2009 Bruno Lowagie, Paulo Soares, et al.
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.

最初の1ページを切り出す

pdftk input.pdf cat 1 output output.pdf