Merging PDFs
There are various ways of merging PDF files. Here’s a simple method that doesn’t require installing any special software since GhostScript is usually installed on Linux systems:
Suppose the file names are UCR1.pdf, UCR2.pdf, and UCR3.pdf. Then
pdf2ps UCR1.pdf 1.ps pdf2ps UCR1.pdf 2.ps pdf2ps UCR1.pdf 3.ps cat 1.ps 2.ps 3.ps > combined.ps ps2pdf combined.ps combined.pdf
The procedure could be generalized and written as a shell script if this becomes a common task. The intermediate postscript files could then be automatically deleted.
Alternatively, there’s a fast free program called PDF Toolkit: pdftk which can do much more than simply merge PDF’s. There is also a GUI interface for pdftk, called PDF Chain.