对于希望将1或2 pg pdf转换为pdf并在横向视图中并排放置2份副本的人（非常适合打印传单），请执行以下操作：
将1或2 pg pdf输入转换为包含这些页面的副本的输出（1-pg pdf-> 2-pg pdf，2-pg pdf-> 4-pg pdf等）：
pdfunite in.pdf in.pdf out.pdf
将复制的pdf合并为每张2页的横向pdf文件，例如用于打印传单：
pdfnup out.pdf
或全部放在一行上：
pdfunite in.pdf in.pdf out.pdf && pdfnup out.pdf
请注意，out.pdf是输入到pdfnup。生成的输出文件pdfnup将称为“ out-nup.pdf ”。
另外，观看pdfnup命令的输出，您将看到命令实际运行的详细形式，这使您可以深入了解可以传递给它的选项。显然在引擎盖下pdfnup使用pdfjam：
pdfjam：有效调用此pdfjam的方法：
/usr/bin/pdfjam --suffix nup --nup '2x1' --landscape -- out.pdf -
例：
原始PDF（“ 纵向 ” 视图中为1个常规pg），“ in.pdf ”：
最终PDF（在“景观”视图中并排2 pgs），“ out-nup.pdf ”：
-现在可以在中间切成两半作为传单散发
简单的Bash功能： make_flyer
复制此bash函数并将其粘贴到“〜/ .bashrc”文件的底部，以访问简单易用的命令make flyer：
# Description: outputs a landscape-oriented flyer pdf ("my/pdf/input--flyer.pdf") for each 1 or more pg input pdf ("my/pdf/input.pdf")
# - 1-pg input PDFs are converted to a 1-sided landscape, printable flyer that you cut down the center to make
# 2 flyers
# - 2-pg input PDFs are converted to a 2-sided landscape, printable flyer (flip on short edge when printing
# double-sided), and also cut down the middle to make 2 flyers
# - **3+ pg input PDFs**: using `pdfnup` directly in this case would make more sense, since this function will
# otherwise unneccessarily create 2 copies
# - 3 and 4-pg input PDFs are converted to a single piece of paper, double-sided, flipped on short edge, x 2 copies.
# No cutting is necessary
# - 5+ pg input PDFs simply require half as much paper to print is all since you get 2 pages per side of paper;
# they do NOT print like booklets, but rather just as a landscape-printed, flipped-on-short-edge bundle of pages
# (like a deck of slides). You get *2 copies* per print though, so just print half the pages.
make_flyer() {
num_args=$# # see: https://stackoverflow.com/questions/4423306/how-do-i-find-the-number-of-arguments-passed-to-a-bash-script/4423321#4423321
suffix="flyer"
loop_cnt=0
for inputpdf in "$@"
do
((loop_cnt++))
echo "==== CONVERTING PDF $loop_cnt OF $num_args ===="
echo " INPUT: \"$inputpdf\""
# Strip off the .pdf extension from the input path, while retaining the rest of the path
# - See: https://stackoverflow.com/questions/12152626/how-can-i-remove-the-extension-of-a-filename-in-a-shell-script/32584935#32584935
input_path_base="$(echo "$inputpdf" | rev | cut -f 2- -d '.' | rev)"
input_file_base="$(basename "$inputpdf" .pdf)"
temp_pdf="${input_path_base}-.pdf" # is "input_path_base-.pdf"
echo " OUTPUT: \"$(pwd)/${input_file_base}--${suffix}.pdf\""
# Convert a single 1-pg pdf into a temporary 2-pg pdf
pdfunite "$inputpdf" "$inputpdf" "$temp_pdf"
# Lay out the temporary 2-pg pdf into a side-by-side 1-sided flyer to print; creates "input_path_base--flyer.pdf"
# Note that `pdfnup` places the output from this operation in the location from where you call this script
# (ie: in your `pwd` [Present Working Directory])!--NOT the location where temp_pdf is located!
pdfnup "$temp_pdf" --suffix $suffix
# Delete the temporary 2-pg pdf, called "input_path_base-.pdf", thereby leaving only the original
# "input_path_base.pdf" and the new "input_path_base--flyer.pdf"
rm "$temp_pdf"
done
}
alias make_flyer_help='echo -e "Ex usage: make_flyer \"path/to/inputpdf.pdf\" - Creates a landscape-side-by-side flyer version called \"inputpdf--flyer.pdf\"\n *in your pwd* from a 1 or 2 pg input pdf called \"path/to/inputpdf.pdf\". Accepts multiple arguments. Ex:\n make_flyer \"path/to/inputpdf1.pdf\" \"path/to/inputpdf2.pdf\""'
用法示例：
make_flyer "path/to/inputpdf1.pdf" "path/to/inputpdf2.pdf"
查看帮助信息：
make_flyer_help
输出：
$ make_flyer_help
Ex usage: make_flyer "path/to/inputpdf.pdf" - Creates a landscape-side-by-side flyer version called "inputpdf--flyer.pdf"
*in your pwd* from a 1 or 2 pg input pdf called "path/to/inputpdf.pdf". Accepts multiple arguments. Ex:
make_flyer "path/to/inputpdf1.pdf" "path/to/inputpdf2.pdf"
参考文献：
- https://superuser.com/a/948095/425838
- https://stackoverflow.com/a/11280219/4561887
有关：
- https://askubuntu.com/questions/214538/printing-in-booklet-format/1095789#1095789
Bash参考：
- Bash如何将参数传递给Bash函数：https : //bash.cyberciti.biz/guide/Pass_arguments_into_a_function
- Bash连接字符串：https : //linuxize.com/post/bash-concatenate-strings/
- Bash执行存储为字符串的cmd！https://stackoverflow.com/questions/2005192/how-to-execute-a-bash-command-stored-as-a-string-with-quotes-and-asterisk
- Bash将所有输入迭代到一个cmd：https : //stackoverflow.com/questions/255898/how-to-iterate-over-arguments-in-a-bash-script/255913#255913
- Bash将参数传递给函数：https : //stackoverflow.com/questions/6212219/passing-parameters-to-a-bash-function/6212408#6212408
- 如何将1-pg pdf转换为传单[我自己的答案！]：如何将1页PDF转换为每页PDF 2页？
