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Full Discussion: How to extract date and time from filename?
Top Forums UNIX for Beginners Questions & Answers How to extract date and time from filename? Post 303005608 by apmcd47 on Friday 20th of October 2017 04:50:02 AM
Old 10-20-2017
Quote:
Originally Posted by Home
Thank you for your reply.

There are more than 6 files with these filenames which begins with 'WI_SCOPE_'. Could you give me an example that how I can write a loop that read these files and extract the date?
Taking vgersh99's awk solution and modifying it slightly (you need Gnu AWK and Gnu date for this - my Ubuntu system has mawk installed as awk and Gnu AWK installed as gawk)

Code:
for fname in WI_SCOPE_*
do
   secs=$(date +%s --date=$(echo $fname | gawk -F'[_.]' '{print $(NF-2),gensub(/-/,":","g",$(NF-1))}' OFS=T))
   ### now you have file name in fname and file time AS SECONDS in secs
done

If your version of Linux has Gnu AWK as awk you can change the line to use awk

Andrew
 

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LEARN ABOUT LINUX

tzselect

TZSELECT(8)						    Linux System Administration 					       TZSELECT(8)

NAME

       tzselect - select a timezone

SYNOPSIS

       tzselect

DESCRIPTION

       The  tzselect  program asks the user for information about the current location, and outputs the resulting timezone description to standard
       output.	The output is suitable as a value for the TZ environment variable.

       All interaction with the user is done via standard input and standard error.

EXIT STATUS

       The exit status is zero if a timezone was successfully obtained from the user, nonzero otherwise.

ENVIRONMENT

       AWK    Name of a Posix-compliant awk program (default: awk).

       TZDIR  Name of the directory containing timezone data files (default: /usr/share/zoneinfo).

FILES

       TZDIR/iso3166.tab
	      Table of ISO 3166 2-letter country codes and country names.

       TZDIR/zone.tab
	      Table of country codes, latitude and longitude, TZ values, and descriptive comments.

       TZDIR/TZ
	      Time zone data file for timezone TZ.

SEE ALSO

       tzfile(5), zdump(8), zic(8)

COLOPHON

       This page is part of release 3.55 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

								    2007-05-18							       TZSELECT(8)
All times are GMT -4. The time now is 06:48 AM.
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