#!/bin/bash

# 判断参数个数是否小于 1
if [ "$#" -lt 1 ]; then
        echo "usage: ${0} logFileName"
        echo "    ${0} 20231227.log"
        echo "    ${0} 20231230.log"
        echo "    ..."
        exit 1
fi

while true; do
        echo "clean file ..."
        ls -lrth
        : > ./$1
        ls -lrth

        echo "clean ok, sleep ..."

        sleep 50
done