Created script to backup the database

scripts/backup.sh

+#!/bin/bash
+#
+# Script to create a complete dump of a Drupal Postgresql database, keeping two backups at
+# the same time, one for yesterday and one for today.
+#
+# You have to specify the folder where backups have to be saved and the name of
+# the database.
+# The script uses pg_dump
+# Suggestion: indicate the complete path.
+# 
+# Use as ./backup.sh ~/backupFolder databaseName
+#
+# Copyright (C) 2014 Riccardo Padovani <riccardo@rpadovani.com>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>
+
+# Backup directory
+DIR=${1}
+DBNAME=${2}
+
+# Check if the directory exists, if not, create it
+if [ ! -d $DIR ]; then
+    mkdir $DIR
+fi
+
+# If there is yesterday backup, then delete it
+if [ -f $DIR/yesterday.tar.gz ]; then
+    rm -f $DIR/yesterday.tar.gz
+fi
+
+# If there is a backup of today, move it to yesterday
+if [ -f $DIR/today.tar.gz ]; then
+    mv $DIR/today.tar.gz $DIR/yesterday.tar.gz
+fi
+
+# Create the backup
+pg_dump $DBNAME > $DIR/today.sql
+tar -xczf $DIR/today.tar.gz $DIR/today.sql
+# Remove the temp file
+rm $DIR/today.sql