hello I am writing a news downloader from command line for calibre (calibre-ebooks.com) the script gets the id of an ebook from calibre DB using this command
calibredb list --with-library '/mediacenter/media/Książki' | grep --line buffered "Benchmark.pl" | cut -c 1
but it works only for id 1-9
tried searching on the web and experimenting myself but I can't find anything
if you wonder how the output from calibredb looks like:
uniqueid name date author
10 Benchmark.pl [pią, 24 mar 2017] calibre
(i need that first unique id)
I suspect you would be better off with awk if you want to find lines that start with digits and contain "Benchmark":
calibredb ... | awk '/^[0-9]+/ && /Benchmark/ {print $1}'
Or, if you like grep:
calibredb ... | grep "Benchmark" | grep -Eo "^[0-9]+"