Backup refers to making copies of data so that these additional copies may be used to restore the original after a data loss event.
Hot backup Edit
A hot backup or a live backup is one that's done while the files are being used. Unlike with a cold backup, you have to might have to either access or avoid running or locked files.
- Rsync - A tool which can synchronize the differences between two folders, even optimized to only transfer the differences if transferring between to machines running rsync
- Cloning - Backup of an entire harddrive, including any OS on it (note that on restore Windows might return a BSOD, see Migrating Windows)
- Centralized backup
- With services like Amanda, backup multiple computers and systems to one backup server