Bash script to switch between Plone DB

switch_plone_db.sh

#!/bin/bash

if [[ $# != 1 ]];
then
    echo "Illegal number of parameters, needed 1"
    exit 1
fi

if [[ -d $1 ]];
then
   if [[ -d ./filestorage/$1 ]];
   then
       currentDB=$(readlink ./filestorage/Data.fs | cut -d "/" -f2)

       if [[ -e ./blobstorage ]];
       then
           rm -f ./blobstorage
       fi

       ln -sf "./$1" ./blobstorage
       ln -sf "./$1/Data.fs" ./filestorage/Data.fs

       if [[ -d ./filestorage/"$currentDB" ]];
       then
           cp ./filestorage/Data.fs.index ./filestorage/"$currentDB"/
       fi

       if [[ -f ./filestorage/Data.fs.index ]];
       then
           rm -f ./filestorage/Data.fs.index || return
       fi
       cp "./filestorage/$1/Data.fs.index" ./filestorage/Data.fs.index

       echo "Changed DB to $1"
   else
       echo "Directory structure non regular"
       exit 2
   fi
else
    echo "Directories not found"
    exit 3
fi

exit 0