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Top Forums UNIX for Dummies Questions & Answers How to find the latest file on Unix or Linux Post 302095369 by duke0001 on Monday 6th of November 2006 01:22:11 PM
Old 11-06-2006
Carl:

Thanks so much. It works.

ls -tr, -t sort by time, -r switch reverses it so the newest file is at the end of the listing. Then pipe to tail -1, it will pick up the latest file ( or say last file in the list) by time. Then it will move to new directory. Because I need re-name the file, so I code like this:

cp `ls -tr | tail -1` /temp/newfile_name
 

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TAIL(1) 						      General Commands Manual							   TAIL(1)

NAME
tail - deliver the last part of a file SYNOPSIS
tail [ +-number[lbc][rf] ] [ file ] tail [ -fr ] [ -n nlines ] [ -c nbytes ] [ file ] DESCRIPTION
Tail copies the named file to the standard output beginning at a designated place. If no file is named, the standard input is copied. Copying begins at position +number measured from the beginning, or -number from the end of the input. Number is counted in lines, 1K blocks or bytes, according to the appended flag or Default is -10l (ten ell). The further flag causes tail to print lines from the end of the file in reverse order; (follow) causes tail, after printing to the end, to keep watch and print further data as it appears. The second syntax is that promulgated by POSIX, where the numbers rather than the options are signed. EXAMPLES
tail file Print the last 10 lines of a file. tail +0f file Print a file, and continue to watch data accumulate as it grows. sed 10q file Print the first 10 lines of a file. SOURCE
/src/cmd/tail.c BUGS
Tails relative to the end of the file are treasured up in a buffer, and thus are limited in length. According to custom, option +number counts lines from 1, and counts blocks and bytes from 0. Tail is ignorant of UTF. TAIL(1)
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