sed '/^$/d' ${IN_FILE} > ${OUT_FILE}
perl -pe 's/\r\n/\n/' ${IN_FILE} > ${OUT_FILE}
#!/bin/bash while read LINE do echo ${LINE} done < "hogehoge.txt"
split -100 [input_filename] [output_prefix]
split -b 1024k [input_filename]
cat [prefix]* > [output_filename]