From: bruce <badouglas@xxxxxxxxx>
Subject: Re: tail for a list of files
On Sun, Mar 4, 2018 at 2:31 PM, Joe Zeff <joe@xxxxxxx> wrote:
On 03/04/2018 11:15 AM, R. G. Newbury wrote:
find . -name "*.pdf" | tail -n 2
does not 'find' the files in canonical order: it outputs 124.pdf and
126.pdf
What does it print if you don't run it through tail?
um.. hey guys....
I wanted to get the last X lines of each file from an input/wildcard
list of files !!
so.. I wanted the last 5 lines of the 126.pdf as well as the last 5
lines of the 125.pdf...
--NOT the last X files from a list of files..
thanks
Ahh, well you should *said* so. We all went running off in all
directions *at once*!
This time I created 4 files 123.txt, 124.txt etc. each with 10 lines
numbered 1 to 10
To get the last 5 lines of every ".txt" file
Use:
$ for file in $(find . -name "*.txt"); do cat $file | tail -n 5; done
To display the filename, and last 5 lines of each of the last 2 files
Use:
$ for file in $(find . -name "*.txt" | sort | tail -n 2); do echo
$file; cat $file | tail -n 5; done
Output is:
./125.txt
7
8
9
10
./126.txt
7
8
9
10
YOu may have to be careful about the use of the 'sort' pipe: you may
need to add a switch to enforce a particular sort order. Sort can leave
you out of sorts that way.
Geoff
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