Awk

学习用，未整理 http://www.lampchina.net/article/htmls/201004/Mjg0Mzky.html

awk 'BEGIN{v_list="hello good well done";n=split(v_list,ch);i=1;while(i<=n){print ch[i];i++}}'

awk -F[分隔符集] '{print $1}' filename     #使用两个分隔符

awk '{sum+=$1}; END{print sum}' #求和

AWK Array Script To Find File Maximum, Minimum and Total File Sizes

#!/bin/bash
# Written by Vivek Gite <www.cyberciti.biz>
# AWK to list total file size, minimum, maximum and other size using Arrays
# --------------------------------------------------------------------------
# Copyright (C) 2007 nixCraft project <http://www.cyberciti.biz/tips/contact-us>
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# http://bash.cyberciti.biz/file-management/awk-array-script-to-find-file-maximum-minimum-and-total-file-sizes/
# -------------------------------------------------------------------------
 
dirs="$@"
 
[ $# -eq 0 ] && { echo "Usage: $0 dir1 dir2 dir N"; exit 999; }
 
for d in $dirs
do
    [ ! -d $d ] && { echo "** Error: $d is not directory"; continue; }
 
    echo "*** Info for $d directory ***"
    ls -Al $d | egrep -wv "^total"  |awk 'BEGIN{c=0;max=0;min=0;total=0}
 
            {arr[c]=$5;c++;total+=$5}
 
            END{
                  for (x = 0; x <= (c-1); x++){
                        if ( arr[x] > max ) max = arr[x];
                     }
                   min=max;
                  for (x = 0; x <= (c-1); x++){
                        if ( arr[x] < min ) min = arr[x];
                     }
            print "Max size:",max, "\nMin size:", min, "\nTotal size:", total}'
done