baka
Simple and flexible file and database backup software written in Bash.
More info in manuals:
Installation
Add repository to /etc/apt/sources.list.d/:
sudo echo 'deb [arch = all] http://repos.gch.icu/debian testing main' > /etc/apt/sources.list.d/gd-debian.list
Add key:
curl -s http://repos.gch.icu/DEB-GPG-KEY | sudo gpg --no-default-keyring --keyring gnupg-ring:/etc/apt/trusted.gpg.d/gd-debian.gpg --import
Update package list and install baka:
sudo apt update
sudo apt install baka
Also you can download DEB package directly: link.
baka pulls the rsync and s3cmd packages as dependencies.
Remote storage
To perform a backup to a remote storage, you need to forward SSH keys between servers in the case of rsync, or configure the .s3cmd config, in the case of copying to an S3-compatible storage (documentation). Of course, nothing prevents you from doing only local backups and transferring them in any convenient way.