tag 30242 notabug thanks On 01/24/2018 02:51 PM, Masoudi wrote: > Hii want to copy some data from a file by using of grep...grep -n A HISTORY > > outbut the desired information is not the line of A, and i need information > located at the next line ( below line of A) > A 1 2 3 > 23 34 55 > i mean i need the line 23 34 55.would you mind to help me please?many thanks
(Your email engine botched the formatting of your mail as rendered in plain text; technical lists tend to frown on html mail as unnecessary overhead and lousy rendering) grep already supports this: use 'grep -A1 "$pattern"' to output a line that matches and the line immediately following the match. If you further want ONLY the line after, you can do things like: grep -n -A1 "$patt" | sed -n 's/^[1-9][0-9]*-//p' which uses the decorate-act-undecorate paradigm (grep -n decorates matches with 'line:' and followups with 'line-'; the sed then picks the followups and removes the decorations). As -A is already documented as a grep option, I'm closing this as not a bug in the database. However, feel free to followup with further questions on the topic. -- Eric Blake, Principal Software Engineer Red Hat, Inc. +1-919-301-3266 Virtualization: qemu.org | libvirt.org
signature.asc
Description: OpenPGP digital signature
