ssh root@IP_ADDRESS
passwd

Installing Software Updates

apt-get update && apt-get upgrade

Setting the Hostname

hostnamectl set-hostname HOSTNAME
hostname

choose [3 vim.basic]

select-editor

Update /etc/hosts

vi /etc/hosts
IPv4 HOSTNAME
IPv6 HOSTNAME

Setting the Timezone

dpkg-reconfigure tzdata
date

Restart cron

service cron status

Add a User Account

adduser USERNAME
adduser USERNAME sudo

Create a SSH folder for USERNAME

su USERNAME
mkdir ~/.ssh && chmod 700 ~/.ssh
touch ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys

Upload SSH key via Local MAC

ssh-keygen -b 4096
scp ~/.ssh/id_rsa.pub USERNAME@IP_ADDRESS:~/.ssh/authorized_keys

Configure SSH Daemon

vi /etc/ssh/sshd_config
PermitRootLogin no (yes)
Port 12345 (22)
AddressFamily inet  #IPv4 only

Restart ssh

sudo systemctl restart ssh

Ubuntu

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