add scripts

scripts/split_to_n.sh

+function get_split(){
+    b=$1
+    e=$2
+    f=$3
+    pname=$4
+    sed -n "${b},${e}p" $f > ${f}_${pname}
+}
+
+
+if [ $# != 2 ];then
+    echo "should give the text name, and the num of splits"
+    exit
+fi
+
+base=0
+filename=$1
+total_line=`cat $filename | wc -l`
+num_of_splits=$2
+echo total_line: $total_line
+
+step=$[ $total_line/$num_of_splits ]
+echo step: $step
+
+#get_split 1 5 text 1
+
+cnt=1
+for((;$base<$total_line;));do
+    echo $[ $base + 1 ] ,  $[ $base + $step ], cnt: $cnt
+    get_split $[ $base + 1 ] $[ $base + $step ] $filename $cnt
+    base=$[ $base + $step ]
+    cnt=$[ $cnt + 1 ]
+done