ubuntu

ubuntu.txt

if configured openssh during installation with 'ubuntu' user:
  edit dev:~/.ssh/config and then: ssh ubuntu@...
  $ sudo useradd nakilon
  $ adduser nakilon sudo
  $ echo "nakilon ALL=(ALL:ALL) NOPASSWD: ALL" > /etc/sudoers.d/dont-prompt-nakilon-for-sudo-password && chmod 440 /etc/sudoers.d/dont-prompt-nakilon-for-sudo-password
  $ mkdir -p /home/nakilon/.ssh
  $ sudo cp ~/.ssh/authorized_keys /home/nakilon/.ssh/
  $ sudo chmod 700 /home/nakilon/.ssh
  $ sudo chmod 600 /home/nakilon/.ssh/authorized_keys
  $ sudo chown -R nakilon:nakilon /home/nakilon
else:
  $ sudo su
  $# mkdir ~/.ssh
  $# curl https://github.com/nakilon.keys >> .ssh/authorized_keys
  $# useradd nakilon
  $# adduser nakilon sudo
  $# echo "nakilon ALL=(ALL:ALL) NOPASSWD: ALL" > /etc/sudoers.d/dont-prompt-nakilon-for-sudo-password && chmod 440 /etc/sudoers.d/dont-prompt-nakilon-for-sudo-password
  #$ mkdir -p /home/nakilon/.ssh
  $# cp ~/.ssh/authorized_keys /home/nakilon/.ssh/
  $# chmod 700 /home/nakilon/.ssh
  $# chmod 600 /home/nakilon/.ssh/authorized_keys
  $# chown -R nakilon:nakilon /home/nakilon
then
  edit dev:~/.ssh/config and ressh as nakilon
  $ sudo chsh -s /bin/bash $(whoami)
  ressh

# $ sudo apt install -y curl
$ sudo apt install -y tree htop nano rsync screen git 
$ nano ~/.bash_profile
  export HISTFILESIZE=100500
  export HISTSIZE=100500
  export HISTCONTROL=ignoredups:ignorespace
  export HISTTIMEFORMAT='%F %T '
  export PROMPT_COMMAND="history -a; if [[ -e CATME.txt && \"\$PWD\" != \"\$HOME\" && \"\$(history 1 | awk '{print \$4;}')\" == 'cd' ]]; then cat CATME.txt; fi;"
  export EDITOR=nano  
append some stuff about color and such from ~/.bashrc or /home/ubuntu/.bashrc
$ source ~/.bash_profile

(https://help.ubuntu.com/community/SwapFaq)
check swap
  $ cat /proc/swaps
  $ free
  $ htop
  $ swapon --show
if there is no swap
  $ sudo fallocate -l 8g /mnt/disks/swap/swapfile
  $ sudo chmod 600 /mnt/disks/swap/swapfile
  $ sudo mkswap /mnt/disks/swap/swapfile
  $ sudo swapon /mnt/disks/swap/swapfile
  check swap
  $ echo '/mnt/disks/swap/swapfile swap swap defaults 0 0' | sudo tee -a /etc/fstab
else resize /swap.img if needed
  $ sudo swapoff /swap.img 
  $ sudo rm /swap.img
  $ sudo fallocate -l 1g /swap.img
  $ sudo chmod 600 /swap.img
  $ sudo mkswap /swap.img
  $ sudo swapon /swap.img
  check swap

generate keys (for example, for github deploy access)
  (https://docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent)
  $ ssh-keygen -t ed25519 -C ubuntu

docker
  install
    (https://stackoverflow.com/q/61401626/322020)
    $ sudo apt install -y docker.io
  to disable shutting down on Ubuntu's "daily upgrade": $ sudo apt-mark hold docker.io
  check autorun
    $ sudo systemctl is-enabled docker.service
    $ sudo systemctl is-enabled containerd.service
  ability to not prepend sudo
    $ sudo usermod -aG docker $USER   # 'Log out and log back in so that your group membership is re-evaluated.'
    $ newgrp docker   # not sure why it asked password and now just logs me in as root -- maybe because I didn't relogin
    check: $ docker ps
  $ sudo apt install -y docker-compose
  
compose-launcher
  (https://github.com/rbenv/rbenv)
  $ sudo apt install -y rbenv
  $ ssh-keygen -C <machine name>
  $ git clone [email protected]:Nakilon/trash.git ~/_/compose-launcher
  $ cd ~/_/compose-launcher/servers/... && ruby ../compose-launcher.rb
  for hotfixes do the edits in the corresponding ~/_/ dir, not in the ~/_/compose-launcher/servers/...