Method A - Copy (CP) Command
cp -ruvf source_folder/ destination_folder/
In the above:
-r indicates recursive
-u indicates to copy if file is newer or does not exist
-v indicates to print verbose the activity being performed
-f indicates to force the overwrite of existing files
Method B - Remote Synch (RSYNC) Command
rsync -rtvu source_folder/ destination_folder/
In the above:
-r indicates recursive
-t indicates to preserve the modification time
-v indicates to print verbose the activity being performed
-u indicates to copy if file is newer or does not exist