personal_website/content/notes/server/Server.md

tags, title, description, date, author

tags	title	description	date	author
Server	Server notes	Server notes	2025-01-01	Nikola Petrov

To prevent updating of a specific package?

Hold a package:

sudo apt-mark hold <package-name>

Remove the hold:

sudo apt-mark unhold <package-name>

Show all packages on hold:

sudo apt-mark showhold

USE APT PURGE TO REMOVE APPS

Dynamic DNS

DDClient YouTube NameCheap

Install & Setup Instructions: sudo apt-get install ddclient sudo nano /etc/ddclient.conf daemon=3600 ssl=yes protocol=dyndns2 use=web, web=myip.dnsomatic.com server=updates.dnsomatic.com login=Your OpenDNS login password=Your OpenDNS Password all.dnsomatic.com

sudo nano /etc/default/ddclient run_ipup="false" run_daemon="true" daemon_interval=3600

To run it initially: sudo ddclient -daemon=0 -debug -verbose -noquiet

Shutdown

systemctl reboot
systemctl poweroff

Raid

https://linuxconfig.org/linux-software-raid-1-setup

ssh

in ~/.ssh/authorized_keys paste your pub key and then disable password login in /etc/ssh/sshd_config change PasswordAuthentication to no

ssh-keygen -t ed25519
systemctl reload sshd

Network monitor tool

vnstat --help

python venv in debian

sudo apt install -y python3-full python3-pip
python -m venv venv