Linux awk

1.1    awk脚本基本结构

awk 'BEGIN{ print "start" } pattern{ commands } END{ print "end" }' file
awk 'BEGIN{ i=0 } { i++ } END{ print i }' filename

awk -F ',' '{print $3}'

1.2    max

awk -F ',' 'BEGIN {max = 0} {if ($1>max) max=$1 fi} END {print "maxWTID=", max}' CV1.txt

1.3    min

min的初始值设置一个超大数即可

awk -F ',' 'BEGIN {min = 99999999999999} {if ($3<min) min=$3 fi} END {print "minWTID=", min}' CV1.txt