A shell script what utilize rsync to backup import folders of desktop.

sync_desktop.sh

#!/bin/sh

# -delete flag will delete unmatched files and folder on target.
#DELETE_FLAG=-delete
DELETE_FLAG=

# The rsync flags
# -a, --archive              
#     This is equivalent to -rlptgoD. It is a quick way of saying you want recursion and want to preserve almost
#     everything (with -H being a notable omission).
# -u, --update
#     This forces rsync to skip any files which exist on the destination and have a modified time that is newer than
#     the source file.
# -t, --times
#     This tells rsync to transfer modification times along with the files and update them on the remote system.
# -C, --cvs-exclude
#     This is a useful shorthand for excluding a broad range of files that you often don't want to transfer between
#     systems. It uses the same algorithm that CVS uses to determine if a file should be ignored.
# -v, --verbose               
#     increase verbosit
SRC=~/Movies ~/Documents
DST=`dirname "$0"`/backup
EXCLUDE_FOLDER=--exclude='*/[cC]ache/'
for i in ${SRC}/*;
do
    rsync -Cavut ${DELETE_FLAG} ${EXCLUDE_FOLDER} "$i" "$DST"
done