Home pdftk extract random pages from script variable
 I have some pdf files about 2000 pages. They are randomly generated. I need to extract some pages that contain some specific patterns, that changes its page number for every pdf. With some steps using pdfToText and AWK, I can get the page numbers and I store some info into a csv file like that: PatternA ; 1 3 5 7 PatternB ; 1 8 10 22  I have been trying to do a loop to get and process each line from this csv into the cat option from pdftk command, but it aways return error: $IFS=$(printf '\n\t') for line in cat job.csv do pattern=echo $line ¦ cut -d ';' -f 1 pages=echo$line ¦ cut -d ';' - f 2 pdftk input.pdf cat $pages output$pattern done  When echoing pattern and pages variables, everything are ok. But the pdftk command returns error if I try to get pages from \$pages variable: Error: Unexpected text in page range end, here: 1 3 5 7 Exiting. Acceptable keywords, for example: "even" or "odd". To rotate pages, use: "north" "south" "east" "west" "left" "right" or "down" Errors encountered. No output created. Done. Input errors, so no output created.  What I am doing wrong? Thanks!