Linux Pi

Updated: January 14, 2024

converting this document to nixos, then will be deleted :/

Table of Contents

• First Login
• Create Static IP
• Create Users
• Timezone
• Enable Containers
• CLI Tools
• OhMyZSH
• SSH
• GIT

NEW UBUNTU PI4 SETUP

• Flash with BalenaEtcher
• Default user & password: ubuntu

FIRST LOGIN

• If IP/MAC are in known_hosts => remove old key
• Set new password when prompted
• Set new name of machine sudo vim /etc/hostname
• Set /etc/hosts to include 127.0.1.1 for hostname so it can respond by hostname (restart)
• Login with new creds & perform sudo apt update && sudo apt upgrade -y
• Remove news (ad) set to 0 in /etc/default/motd-news
• More motd adjustment sudo chmod -x 10-help-text
• All motd can be disabled per user touch $HOME/.hushlogin

CREATE STATIC IP

For Ubuntu Servers (best option)

# first disable cloud
sudo vim /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg

network: {config: disabled}

# edit netplan file
sudo vim /etc/netplan/50-cloud-init.yaml

network:
    ethernets:
        eth0:
            dhcp4: no
            addresses:
              - 10.0.18.10/24
            gateway4: 10.0.18.1
            nameservers:
              addresses: [9.9.9.9, 8.8.8.8]
            match:
                driver: bcmgenet smsc95xx lan78xx
            optional: true
            set-name: eth0
    version: 2

# make it so
sudo netplan apply

# check that it worked
ip addr show dev eth0

NOT the best option sudo vim /etc/dhcpcd.conf and add:

interface eth0
static ip_address=10.0.18.20/24
static routers=10.0.18.1
static domain_name_servers=9.9.9.9 8.8.8.8

CREATE USERS

• Add user sudo adduser username => prompt password creation.
• Add to admin privileges sudo usermod -aG sudo username
• Logout and back in with new username (works proceed to next)
• Remove default user sudo deluser --remove-home ubuntu

SET TIMEZONE

• Check current systems timezone timedatectl
• Find you zone in the list timedatectl list-timezones => q to exit
• Then set ex. sudo timedatectl set-timezone America/New_York
• Run timedateclt to verify

ENABLE CONTAINERS

sudo vim /boot/cmdline.txt
cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory

INSTALL CLI TOOLS

• sudo apt install zsh git cowsay fortune inxi apt-transport-https ca-certificates curl software-properties-common

MAKE IT FANCY

• Go to https://ohmyz.sh/#install & run either curl or wget
• Say y to switch to this shell
• Run git clone https://github.com/zsh-users/zsh-autosuggestions ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-autosuggestions
• Run git clone https://github.com/zsh-users/zsh-syntax-highlighting.git ${ZSH_CUSTOM:-~/.oh-my-zsh/custom}/plugins/zsh-syntax-highlighting
• Copy this .zshrc to ~ or just run:
  • curl -o ~/.zshrc "https://gitlab.com/api/v4/projects/12002459/repository/files/zsh%2F.zshrc/raw?ref=linux"
• Vim Settings curl -o ~/.vimrc "https://gitlab.com/api/v4/projects/12002459/repository/files/vim%2F.vimrc/raw?ref=master"

SETUP SSH

Ideally for server machines we will only need to put pub keys on for access. Also need to set privleges for local access only.

ssh-copy-id -i ~/.ssh/id_ed25519.pub user@host

SETUP GIT

# set username
git config --global user.name "user"
# set email
git config --global user.email "email"