[CentOS] grep/sed help

nate centos at linuxpowered.net
Wed Jun 10 19:01:14 UTC 2009

Joseph L. Casale wrote:

> if the text indented beneath it has "D:", then do the same and extract
> "SNAPSHOT ID" if and only if "E:" follows?

If the line counts are constant you could do the reverse:

grep -B 3 "\(E:\|D:\)" input.txt  | grep Shadow

Which would show the 3 lines above a line that has E:\ or D:\ and
then only display the lines with the word Shadow.


More information about the CentOS mailing list