shell自動処理ファイル内部操作

#!/bin/bash
# logs
# 2018/2/2  yeng

PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH


check_error(){
if [ $? -eq 1 ];then
        echo "$1 error" >/root/t.log
        return 1
fi
}


iotops(){
#    :                       
iotop >1.txt <