#!/bin/sh
#    Authors:Leitbogioro
#    https://github.com/leitbogioro/
#    https://www.zhihu.com/column/originaltechnic
UpdateLog="/var/log/packagesupdatefile.log"
if [ -f "$UpdateLog" ]; then
  rm -rf $UpdateLog
fi
apt update | tee -a "$UpdateLog" > /dev/null 2>&1
UpdateRemind=`cat $UpdateLog | tail -n 1`
echo $UpdateRemind
Result=$(echo $UpdateRemind | grep "*packages can be upgraded*")
if [[ "$Result" != "" ]]; then
  printf "$UpdateRemind"
fi
rm -rf $UpdateLog