删除最后五行

#!/bin/bash

#---------cutting file----------

IN=/share1/projects/project_mwr/tophat_result

#filename=$IN/Sample_ZJ-GFP-/countlist.txt

filename=$IN/Sample_ZJ-GFP+/countlist.txt

#---------cuttint last lin -----

cutnu=5

cutnum=`expr $cutnu - 1`

filetmp=`cat $filename|wc -l`

filelen=`expr $filetmp - $cutnum`

fileend=`cat $filename|wc -l`d

sed -i "$filelen,$fileend" $filename

echo "cut the last 5 line finished!"