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Full Discussion: Loop through files in a directory
Top Forums Shell Programming and Scripting Loop through files in a directory Post 302902971 by ali.seifaddini on Friday 23rd of May 2014 09:08:52 AM
Old 05-23-2014
Loop through files in a directory
Hello

How do I loop through files in a specific directory ?

This script is not working!

Code:
#! /bin/bash
FILES=/usr/desktop/input/*
For f in $FILES;
do
awk '-v A="$a" -v B="$b" {$6=($1-64)/2 ;$7=((10^($6/10))/A)^(1/B) ; print}' OFS="\t" $f > /root/Desktop/output/$f.txt;
done

Orginal txt file:

Code:
$1      $2            $3             $4
74   3.99166 101.37082  2.000
74   3.99166 101.37834  2.000
75   3.98416 101.37082  2.000
75   3.98416 101.37834  2.000
81   3.96916 101.29571  2.000
  0   3.96166 101.28820  2.000
 82   3.96166 101.29571  2.000
 85   3.96167 101.31073  2.000


Expected result:

Code:
$1         $2             $3                $4                  $5        $6
74	3.99166	101.37082	2.000		5	0.0748783
74	3.99166	101.37834	2.000		5	0.0748783
75	3.98416	101.37082	2.000		5.5	0.0804649
75	3.98416	101.37834	2.000		5.5	0.0804649
81	3.96916	101.29571	2.000		8.5	0.12391
0	3.96166	101.28820	2.000		-32	0.000364633
82	3.96166	101.29571	2.000		9	0.133155
85	3.96167	101.31073	2.000		10.5	0.165237

Thanks in advance
 

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LEARN ABOUT DEBIAN

ioping

IOPING(1)							   User Commands							 IOPING(1)

NAME

       ioping - simple disk I/O latency monitoring tool

SYNOPSYS

       ioping [-LCDRq] [-c count] [-w deadline] [-p period] [-i interval] [-s size] [-S wsize] [-o offset] device|file|directory

       ioping -h | -v

DESCRIPTION

       This tool lets you monitor I/O latency in real time.

OPTIONS

       -c count
	      Stop after count requests.

       -w deadline
	      Stop after deadline time passed.

       -p period
	      Print raw statistics for every period requests.

       -i interval
	      Set time between requests to interval (1s).

       -s size
	      Request size (4k).

       -S size
	      Working set size (1m).

       -o offset
	      Offset in input file.

       -L     Use sequential operations rather than random. This also sets request size to 256k (as in -s 256k).

       -C     Use cached I/O.

       -D     Use direct I/O.

       -R     Disk seek rate test (same as -q -i 0 -w 3 -S 64m).

       -q     Suppress human-readable output.

       -h     Display help message and exit.

       -v     Display version and exit.

   Argument suffixes
       For options that expect time argument (-i and -w), default is seconds, unless you specify one of the following suffixes (case-insensitive):

       us, usec
	      microseconds

       ms, msec
	      milliseconds

       s, sec seconds

       m, min minutes

       h, hour
	      hours

       For  options that expect "size" argument (-s, -S and -o), default is bytes, unless you specify one of the following suffixes (case-insensi-
       tive):

       s      disk sectors (a sector is always 512).

       k, kb  kilobytes

       p      memory pages (a page is always 4K).

       m, mb  megabytes

       g, gb  gigabytes

       t, tb  terabytes

       For options that expect "number" argument (-p and -c) you can optionally specify one of the following suffixes (case-insensitive):

       k      kilo (thousands, 1 000)

       m      mega (millions, 1 000 000)

       g      giga (billions, 1 000 000 000)

       t      tera (trillions, 1 000 000 000 000)

EXIT STATUS

       Returns 0 upon success. The following error codes are defined:

       1      Invalid usage (error in arguments).

       2      Error during preparation stage.

       3      Error during runtime.

EXAMPLES

       ioping .
	      Show disk I/O latency using the default values and the current directory, until interrupted.

       ioping -c 10 -s 1M /tmp
	      Measure latency on /tmp using 10 requests of 1 megabyte each.

       ioping -R /dev/sda
	      Measure disk seek rate.

       ioping -RL /dev/sda
	      Measure disk sequential speed.

SEE ALSO

       Homepage <http://code.google.com/p/ioping/>.

AUTHORS

       This program was written by Konstantin Khlebnikov <koct9i@gmail.com>.
       Man-page was written by Kir Kolyshkin <kir@openvz.org>.

								     July 2011								 IOPING(1)
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