#!/bin/bash
#Defines that we are using the Bourne shell interpreter

# Define workspace variables  ###############

BACKUPDIR="/var/www/html"
LOGDIR="/home/User1/logs/backuplogs/"
LOGNAME="`date '+%m-%d-%y'`_Web_Backup.log"
SAVEFILE="Web_Backup_Denver_`date '+%m-%d-%y'`.gz.tar"
REMOTEBACKUPDUMP="User1@sudorandomsonicnet.com:/home/User1/"

#############################################

echo "- "`date` > "$LOGDIR$LOGNAME"
# This writes the date and time that the backup is taking place into the log

echo "- Beginning the backup of: $BACKUPDIR ................" >> "$LOGDIR$LOGNAME"
# This writes the name of the directoy that is being backed up into the log

echo "- Saving log to: $LOGDIR..........." >> "$LOGDIR$LOGNAME"
# This writes to the log, the name of the directory that the log was originally written to

echo "- Filename: $SAVEFILE" >> "$LOGDIR$LOGNAME"
# This writes the name of the file that saves the backup contents

echo >> "$LOGDIR$LOGNAME"
# This writes a blank line into the log file for formatting purposes

tar --recursion --ignore-failed-read -czf $SAVEFILE $BACKUPDIR 2>> "$LOGDIR$LOGNAME" >> "$LOGDIR$LOGNAME"
# This uses the tar command to backup the directory specified by BACKUPDIR
# - The name of the file holding the backup is specified by SAVEFILE
# - The 'c' switch tells tar that you are creating a new file, not opening an existing one
# - The 'z' switch tells tar that you want to compress the file contents using the gzip algorithm
# - The 'f' switch says that the next argument will be the name of the output file

echo >> "$LOGDIR$LOGNAME"
# This writes a blank line for formatting purposes

ls -lh $SAVEFILE >> "$LOGDIR$LOGNAME"
#This calls the ls command to write the properties of the newly created file
# - The 'l' switch tells ls to do a "long listing", which includes permissions and file sizes
# - The 'h' switch tells ls to output file sizes in a "human readable" format such as 430K  

echo "- Sending to $REMOTEBACKUPDUMP ---- `date`" >> "$LOGDIR$LOGNAME"
# This writes a line saying that it is proceeding to send the file to the remote location, and date

scp $SAVEFILE $REMOTEBACKUPDUMP
# This sends the file to the remote location via SCP
# - The SCP command does not require a password, because a trusted key relationship is setup between them

TRANSFERSTATUS=`echo $?`
if [ $TRANSFERSTATUS = '0' ]; then
echo "- Transfer completed successfully" >> "$LOGDIR$LOGNAME"
else
echo "- Transfer failed, exitcode: $TRANSFERSTATUS" >> "$LOGDIR$LOGNAME"
fi