Basically any time you have a unit of work that is either sensitive to outside changes or needs the ability to rollback every change, if an error occurs or some other reason. Look here for some excellent answers and their reasons for using them.
There are two ways I usually do this, both use ssh: scp -r sourcedir/ user@dest.com:/dest/dir/ or, the more robust and faster (in terms of transfer speed) method: rsync -auv -e ssh –progress sourcedir/ user@dest.com:/dest/dir/ Read the man pages for each command if you want more details about how they work.
A Data Transfer Object is an object that is used to encapsulate data, and send it from one subsystem of an application to another. DTOs are most commonly used by the Services layer in an N-Tier application to transfer data between itself and the UI layer. The main benefit here is that it reduces the … Read more