What's your preferred method of #backup a #Linux server (I'm running #debian) in order to recover from a disaster?

How about backing up user data?

I think #zpaq might be great for user data and the like, but anything that might need file permissions or the sort (?) something like #borgmatic might be a better idea?

A new variant of the Agent Tesla #malware has been observed delivered via a lure file with the #ZPAQ compression format to harvest data from several email clients and nearly 40 web browsers☝️🤖

https://thehackernews.com/2023/11/new-agent-tesla-malware-variant-using.html?utm_content=buffer97cf3&utm_medium=social&utm_source=bufferapp.com&utm_campaign=buffer

Look how #zpaq is being used!

Wow!

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8132223/

I found out about #debsums. It popped in my head that "I can use this to see which files I changed on my server and back them up!"

sudo debsums -ca | xargs -I {} zpaq a server-debsums-ca-.zpaq {}

The above uses my favorite archiver--#zpaq (please check it out!), to create incremental, highly compressed backups of such files debsum indicates to us.

This isn't flawless, though. It skips my sshd_config and not every Debian package has an md5 checksum list of every file.

#debian #backups

#compression #zpaq
Bon j'ai écrit un petit topo sur zpaq là : https://sebsauvage.net/links/?iRMA8Q

- mieux que 7z pour compresser des données > 2 Go (avec l'option -m4)
- très similaire à borg pour les backups incrémentaux (avec -m1,2 ou 3 pour une compression plus rapide). (mais je continue à préférer borg pour les backups)

#ZPAQ is an #publicdomain incremental, journaling compressor.

zpaq is an archiver for incremental additions, where new files detected in a directory tree are added to an existing archive. zpaq can extract specific versions of files, encrypt archives, as well as rollback to remove additions, and duduplicate blocks to improve compression. zpaq has an official specification and #Cpp #library.

Website 🔗️: http://mattmahoney.net/dc/zpaq.html

apt 📦️: zpaq

#free #opensource #foss #fossmendations #sysadmin

#Zpaq is used as a Kolmogorov complexity approximation tool in the following article:
​
Phylogeny of the COVID-19 Virus SARS-CoV-2 by Compression (https://www.biorxiv.org/content/10.1101/2020.07.22.216242v2)

Original source: https://encode.su/threads/456-zpaq-updates/page85