Re: Extract last email from an email file (mbox format)

On 25/05/16 16:06, Julian H. Stacey wrote:
> udi M wrote:
>>
>> On 25/05/16 09:12, Xu Wang wrote:
>>> Hi how can I efficiently extract the last email in a huge mbox email file?
>>
>> tac  thaBigBox  |  sed -n -e '1,/^From /p'  |  tac
> tac: Command not found.
I work on Linuxs and  tac(1) is like cat(1) but print the file in 
reverse.  I do not
know BSD but try
          apropos  reverse    or     man -k  reverse
to find the command.

Anyway,  my next answer using formail(1)  is better and safety

--udi


> URL ?
>
> uname -a
> 	FreeBSD lapr.js.berklix.net 11.0-CURRENT FreeBSD 11.0-CURRENT
> 	#10 r300601M: Wed May 25 07:11:11 CEST 2016
> 	[email protected]:/data/release/11.0-CURRENT/usr/obj/usr/src/sys/GENERIC
> 	amd64
> cd /usr/ports; cd */tac
> 	*/tac: No match.
>
> Cheers,
> Julian
> --
> Julian Stacey, BSD Linux Unix Sys Eng Consultant Munich http://berklix.eu/jhs/
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