Shell Programming and Scripting

ls -l>mylist.txt

awk < mylist.txt '{if ($5>75000000) print $5 " " $NF}'

wc -l myfile.txt

split -l 25000 myfile.txt myfile.txt

man split

#!/bin/ksh
#
#

# declare an array and populate it with files larger
# than 2GBs in the current directory
set -A files $(find . -maxdepth 1 -size +2000000 -type f | sed 's/\.\///')

# set counter
counter=0

# get number of files in the array
numfiles=${#files[*]}

# set linecount
linecount=0

# set number of lines
numlines=0

# iterate through the array files, retrieve the line count,
# divide it by 2 and feed everything to the split command
while [ $counter -lt $numfiles ]
do
    linecount=$(wc -l ${files[$counter]} | awk '{print $1}')
    numlines=$(expr $linecount / 2)
    split -l $numlines ${files[$counter]} ${files[$counter]}
    ((counter=$counter+1))
done

# done
exit 0

split -n 2 myfile.txt myfile.txt