Ubuntu

#create new user 'newuser'
sudo adduser newuser 
 
#show current groups
groups newuser
 
#Public Key in ''~/.ssh/authorized_keys'' eintragen
 
#grand sudo rights (by adding user to group sudo)
sudo usermod -aG sudo newuser
 
#deletes user and removes home directory
sudo deluser --remove-home newuser

sudo hostnamectl set-hostname NEUERNAME

1. Netzwerkinterface herausfinden (:!:muss in der Config angepasst werden!):

ip link

2. Datei /etc/netplan/01-netcfg.yaml anlegen/bearbeiten:

network:
  version: 2
  renderer: networkd
  ethernets:
    ens3:
      dhcp4: no
      addresses:
        - 141.45.184.42/25
      routes:
        - to: default
          via: 141.45.184.1
      nameservers:
          addresses: [8.8.8.8, 9.9.9.9]

3. Zugriff beschränken:

chmod 600 /etc/netplan/01-netcfg.yaml

3. Netplan anwenden und Config überprüfen:

sudo netplan apply
ip addr show dev ens3

Create:

sudo mkdir /etc/systemd/resolved.conf.d/
sudo vim /etc/systemd/resolved.conf.d/dns_servers.conf

Insert lines into dns_servers.conf:

[Resolve]
DNS=9.9.9.9 8.8.8.8

Restart systemd-resolved:

sudo systemctl restart systemd-resolved

Source: https://askubuntu.com/questions/1406827/how-to-set-dns-on-ubuntu-22-04-when-you-have-no-netplan-config

• https://kodi.wiki/view/HOW-TO:Set_up_Wake-on-LAN_for_Ubuntu#cite_note-1

WoL als Systemd - Service (16.04):

• https://askubuntu.com/questions/764158/how-to-enable-wake-on-lan-wol-in-ubuntu-16-04
• Python Script für MagicPacket

• https://askubuntu.com/questions/107410/can-you-unencrypt-remove-encryption-from-a-user-home-folder
• http://virtually-a-machine.blogspot.com/2010/08/howto-disable-ecryptfs.html

vor dem Kopieren muss das Home-Verzeichnis schreibbar gemacht werden (Permissions: 700)

• https://gist.github.com/lokhman/cc716d2e2d373dd696b2d9264c0287a3
• https://bookofzeus.com/harden-ubuntu/hardening/sysctl-conf/

2001:db8:333::2/64 auf eth0
2001:db8:333::1/64 ist der Router/Gateway

Enable IPv6 (wenn nötig): $ sudo modprobe ipv6

sudo ip addr add 2001:db8:333::3/64 dev eth0

oder:

sudo ip -f inet6 address add 2001:db8:333::3/64 dev eth0

sudo ip -6 route add ::/0 via 2001:db8:333::1

Anzeigen der an die Interfaces gebundenen Adressen:

ip a

Anzeigen der Routen

netstat -6nr # IPv6 Routen
netstat -nr # IPv4 Routen