Export mongodb database into JSON files, and import the JSON again.

exportDB.sh

#!/bin/bash

if [ ! $1 ]; then
        echo " Example of use: $0 database_name dir_to_store"
        exit 1
fi
db=$1
out_dir=$2
if [ ! $out_dir ]; then
        out_dir="./"
else
        mkdir -p $out_dir
fi

tmp_file="abcdefghijkl.js"
echo "print('_ ' + db.getCollectionNames())" > $tmp_file
cols=`mongo $db $tmp_file | grep '_' | awk '{print $2}' | tr ',' ' '`
for c in $cols
do
    mongoexport -d $db -c $c -o "$out_dir/${c}.json"
done
rm $tmp_file

importDB.sh

#!/bin/bash

if [ ! $1 ]; then
        echo " Example of use: $0 database_name dir_from"
        exit 1
fi
db=$1
import_dir=$2
if [ ! $import_dir ]; then
        import_dir="./"
fi

for file in $import_dir/*.json;
do c=${file#*};
  CN="$(cut -d'/' -f2 <<<"$c")"
  c=${CN%.json};
  mongoimport --db $db --collection "${c}" --file "${file}";
done

how to run?
For export:
$imasif->: bash exportDB.sh [dbname] [directory path to export]

For import:
$imasif->: bash importDB.sh [dbname] [directory path to import]