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Full Discussion: Extracting Date from string
Top Forums Shell Programming and Scripting Extracting Date from string Post 302347948 by cfajohnson on Thursday 27th of August 2009 03:18:10 AM
Old 08-27-2009
Quote:
Originally Posted by r_t_1601
Hi Gurus
I want to extract a date and version code which shall come in filename consisting of underscores.
The filename can contain any / one underscores but the version number will come after date and will be separted by underscore
String formats
=============
ABC_20090815_2.csv
ABC_DEF_20090815_2.csv
ABC_DEF_GH_20090815_2.csv
ABC_DEF_G_I_20090815_2.csv
ABC_DEF_M_N_O_P_20090815_2.csv

In each case i want to extract
date -- 20090815 and
version number -- 2

There's no need for any external command. Use the shell:

Code:
IFS=_.
for file in *.csv
do
  set -- $file
  shift $(( $# - 3 ))
  echo "date=$1"
  echo "version=$2"
done

 

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ifpps(8)							netsniff-ng-toolkit							  ifpps(8)

NAME
ifpps - fetch and format kernel network statistics SYNOPSIS
ifpps -d|--dev <netdev> [-t|--interval <sec>][-p|--promisc][-c|--term] [-C|--csv][-H|--csv-tablehead][-l|--loop][-v|--version][-h|--help] DESCRIPTION
A tiny tool to provide top-like reliable networking statistics. ifpps reads out the 'real' kernel statistics, so it does not give erroneous statistics on high I/O load. OPTIONS
ifpps --dev eth0 Fetch eth0 interface statistics. ifpps --dev eth0 --interval 60 --csv Output eth0 interface statistics every minute in CSV format. OPTIONS
-h|--help Print help text and lists all options. -v|--version Print version. -d|--dev <netdev> Device to fetch statistics for i.e., eth0. -p|--promisc Put the device in promiscuous mode -t|--interval <time> Refresh time in sec (default 1 sec) -c|--term Output to terminal -C|--csv Output in CSV format. E.g. post-processing with Gnuplot et al. -H|--csv-tablehead Print CSV table head. -l|--loop Loop terminal output. AUTHOR
Written by Daniel Borkmann <daniel@netsniff-ng.org> DOCUMENTATION
Documentation by Emmanuel Roullit <emmanuel@netsniff-ng.org> BUGS
Please report bugs to <bugs@netsniff-ng.org> 2012-06-29 ifpps(8)
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