Merge pdfs
+Using Ghostscript
+Ghostscript has a feature to merge multiple pdf files into one. +Although ImageMagick also has this feature, I prefer this one, as it +doesn’t rasterize and scales down the pdf files.
+++Block quote time yay
+
gs -dNOPAUSE -sDEVICE=pdfwrite \
+ -sOUTPUTFILE=output.pdf \
+ -dBATCH 1.pdf 2.pdf