## Explaination of some words

* **backup** = save current data "somewhare".<br>Store your backup outside the local system to have a copy you can access if the system is damaged.

* **cronjob** = start a command in a defined cycle. ie. eve3ry hour, every day, once a week and so on

* **database dump** = backup a database / scheme into a single file

* **full backup** = backup of all data of the local system.

* **incremental backup** = backup of data that have changed since the last backup.

* **prune** = delete old backup sets and thin data in the backup repository. <br>As an example: You can make an hourly backup and define to keep all of them for a week, daily backups for 90 days and monthly backups starting from 1 to 36 monthes (=3 years). The prune actions removes data in the backup storage to thin out your backup data.
  
* **restore** = copy data back from a made backup to the local system.

* **ttl** = time to live<br>Definition how long an information is valid before it needs to be updated again.

* **verify** = check the integrity of backup data