Maven: How to clean your local repository

How many times we delete all ~/.m2/repository and re-download every artifact running mvn package for each project we have in the system? I've done a little script to check every artifact in local maven repository that removes every artifact with wrong MD5 or SHA or without any of them. Run this check-maven-repository.sh script in your shell typing './check-maven-repository.sh' command. Note: I'm not responsible of any problem deriving from the execution of this script.

#!/bin/bash

TXT_BOLD=`tput bold`
TXT_UNDERLINE_ON=`tput smul`
TXT_UNDERLINE_OFF=`tput rmul`
TXT_BLACK=`tput setaf 0`
TXT_RED=`tput setaf 1`
TXT_GREEN=`tput setaf 2`
TXT_YELLOW=`tput setaf 3`
TXT_BLUE=`tput setaf 4`
TXT_MAGENTA=`tput setaf 5`
TXT_CYAN=`tput setaf 6`
TXT_WHITE=`tput setaf 7`
BGD_BLACK=`tput setab 0`
BGD_RED=`tput setab 1`
BGD_GREEN=`tput setab 2`
BGD_YELLOW=`tput setab 3`
BGD_BLUE=`tput setab 4`
BGD_MAGENTA=`tput setab 5`
BGD_CYAN=`tput setab 6`
BGD_WHITE=`tput setab 7`
RST_FORMATTING=`tput sgr0`

 find "~/.m2/repository" -name '*.pom' -o -name '*.jar' | while read i; do 
  if [ -r "$i.sha1" ]; then
   CHK1=`shasum "$i" | awk '{print $1}'`;
   CHK2=`cat "$i.sha1" | awk '{print $1}'`;
   if [ "$CHK1" = "$CHK2" ]; then
    echo -n "$TXT_GREEN"
    echo "OK SHA1 $i  $CHK1=$CHK2";
   else
    echo -n "$TXT_RED"
    echo "KO SHA1 $i  $CHK1=$CHK2"
    echo -n "$RST_FORMATTING"
    echo -n "$TXT_BOLD"
    rm -fv "$i*"
   fi;
  elif [ -r "$i.md5" ]; then
   CHK1=`md5 "$i" | awk '{print $1}'`;
   CHK2=`cat "$i.md5" | awk '{print $1}'`;
   if [ "$CHK1" = "$CHK2" ]; then
    echo -n "$TXT_GREEN"
    echo "OK MD5 $i $CHK1=$CHK2";
   else
    echo -n "$TXT_RED"
    echo "KO MD5 $i  $CHK1=$CHK2"
    echo -n "$RST_FORMATTING"
    echo -n "$TXT_BOLD"
    rm -fv "$i*"
   fi;
  else
   echo -n "$TXT_YELLOW"
   echo "??????? $i";
   echo -n "$RST_FORMATTING"
   echo -n "$TXT_BOLD"
   rm -fv "$i*"
  fi;
 
 done;
 echo "$RST_FORMATTING"