Backup and restore an entire disk with its partitions, or just one partition with Clonezilla.
Backup your Shaarli data
Use a Raspberry Pi to backup your remote databases and files
You have lost your GPG keys and you need to restore your backups. I list the ways to do this.
You GPG keys are precious, this posts shows how you can back them up securely.
This post explores how your MySQL database can be backed up manually and automatically.
This post explores how you can backup your MongoDB database manually or automatically using Studio 3T or mongodump for instance.