Linux barebones quickstart: Difference between revisions

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Set up [[Ubuntu quickstart|Ubuntu]] or [[Centos quickstart|Centos]] or some small embedded whateverism...
Set up [[Ubuntu quickstart|Ubuntu]] or [[Centos quickstart|Centos]] or some small embedded whateverism...


=== Set up IP and hostname ===
==== (Optional) Change the IP ====


Note that a fresh install of ubuntu will set the hostname.  But if you've cloned a VM, for example, you'll need to change hostname:
If this is a VM clone, [[Set your IP|CHANGE YOUR IP NOW]] before you tear your hair out.
 
==== (Optional) Set up hostname ====
 
If you've cloned a VM, or you are using any "lite" OS that doesn't have an installer, you'll need to set your hostname to something unique, as a first step:
  sudo emacs /etc/hostname && sudo hostname newname  # use hostname cmd to set it right away
  sudo emacs /etc/hostname && sudo hostname newname  # use hostname cmd to set it right away
  # NOTE that systemd can also be used: sudo hostnamectl set-hostname newname
  # NOTE that systemd can also be used: sudo hostnamectl set-hostname newname
  # /etc/hosts changes should not be needed, if hostnames are properly configured (dnsmasq DNS -or- work DNS will provide resolution)
  # /etc/hosts changes should not be needed, if hostnames are properly configured (dnsmasq DNS -or- work DNS will provide resolution)


On home lan, dnsmasq doles out the ips based on MAC, make sure you have it configured with your MAC and an available IP.  Add it to hosts file, too.  Should be all you need!
==== (Optional) Set up user m ====


If this is a VM clone, DO THIS NOW, NEVER LET A CLONE USE THE SAME IP, you will tear your clothes and spit on the ground!
"Lite" OS installs will not add a user for you, so if you don't have user m, [[Add a user|add user m now]].
  # for static IPs on ubuntu work machines:
 
  sudo emacs /etc/network/interfaces
==== (Optional) Limit system log size ====
  # for static IPs on centos work machines:  
 
  sudo emacs /etc/sysconfig/network-scripts/ifcfg-ens192
Prevent endless system logging [[Systemd#Log_limit|here]].
  service network restart
 
=== Set up IP ===
  # example:
 
BOOTPROTO=none
On home lan, bitpost dnsmasq doles out the ips based on MAC:
IPADDR=10.122.82.241
  hostname # make note
NETMASK=255.255.255.0
  ip address # make note of MAC - there may be more than one (eg: wired and wifi)
GATEWAY=10.122.82.1
[bitpost#] emacs config/etc/dnsmasq.d/mdm_lan_dnsmasq.conf && sudo service dnsmasq restart
  # reacquire IP on new box
# For VMs, change network adapter if needed to match subnet (eg "LabNet8X")
# for virtualbox no changes were needed (as of yet)


=== Set up DNS ===
=== Copy ssh keys ===
I used to always [[Systemd#DNS|turn off systemd-resolved]].  But as long as /etc/hosts is not a symlink, it should work fine.
sudo apt install openssh-server # if needed (usually)
ssh newbox # via password
# 2022 keys
mkdir -p .ssh/2022
[bitpost#] scp -r .ssh/2022/id_ed25519* newguy:.ssh/2022/
cd .ssh && ln -s 2022/id_ed25519 . && cat 2022/id_ed25519.pub >> authorized_keys
It's time to deprecate this one...
# 2018 keys
mkdir -p .ssh/2018
[bitpost#] scp -r .ssh/2018/id_rsa* newguy:.ssh/2018/
  cd .ssh && ln -s 2018/id_rsa . && cat 2018/id_rsa.pub >> authorized_keys


=== Install basic tools ===
=== Install basic tools ===
  sudo apt install git curl emacs # ubuntu
sudo apt update && sudo apt upgrade -y && sudo apt autoremove -y
  sudo yum install git curl emacs # centos
sudo apt install git curl emacs-nox # ubuntu server
  sudo apt install git curl emacs     # ubuntu desktop
  sudo yum install git curl emacs-nox # centos


=== Set up scripts ===
=== Set up scripts ===
  cd && mkdir development && cd development
  cd && mkdir development && cd development
  git clone bitpost.com:development/scripts.git  
  git clone morosoph:development/scripts.git  
  ./scripts/setup_linux.sh # to continue bootstrapping
  ./scripts/setup_linux.sh [desktop|nodesk] # to continue bootstrapping


That's it, get on with your life.
That's it, get on with your life.
=== MIGRATION IN PROGRESS: config distro machine migration ===
Start to revamp config from [machine]/[distro] to [distro]/[machine] to match scripts.  It's not hard even though it's dangerous.  You can do each machine separately from others.  Get on it!
# DO THIS ALL IN ONE SESSION, do not log out
cd development/config
mkdir -p distro # prolly not needed
git mv machine/distro distro/machine
setup_stow.sh # repeat until it doesn't fail; check each failure to make sure it is a symlink, and simply rm them as you go
=== OLD ===
moving all this to setup_linux.sh and mh-setup-linux command...
cd && ln -s development/scripts scripts
mkdir scripts/[distro]/[new machine]
emacs -nw .bashrc
# export PATH=$HOME/scripts/[distro]/[machine]:$HOME/development/scripts/[distro]/i3:$HOME/development/scripts/[distro]:$PATH
Set up ssh
# openssh-server defaults are ok but see /etc/ssh/sshd_config for details
cd ~/.ssh
scp [another-working-setup]:.ssh/authorized_keys .
scp [another-working-setup]:.ssh/id_rsa_3072_nopswd .
scp [another-working-setup]:.ssh/config .
ln -s id_rsa_3072_nopswd id_rsa
# also add any other private keys and run [chmod 400] on them
Set up config
cd ~/development
git clone bitpost.com:development/config.git
cd config
mkdir -p [distro] && cd distro
cp -rp [existing machine] [new machine]
# EDIT IT ALL
# WARNING - EDIT ACTUAL SYSTEM FILES, NOT repo files, as those will get clobbered when you stow
# BACK EVERYTHING UP AS YOU GO until we get really good at this :-)
git add [new machine]
git commit -a -m "new machine" && git push
cd && ln -s /home/m/development/config/  optional:[gig]/  [distro]/[new machine] config

Latest revision as of 20:33, 27 January 2023

Install the distro

Set up Ubuntu or Centos or some small embedded whateverism...

(Optional) Change the IP

If this is a VM clone, CHANGE YOUR IP NOW before you tear your hair out.

(Optional) Set up hostname

If you've cloned a VM, or you are using any "lite" OS that doesn't have an installer, you'll need to set your hostname to something unique, as a first step: 

sudo emacs /etc/hostname && sudo hostname newname  # use hostname cmd to set it right away
# NOTE that systemd can also be used: sudo hostnamectl set-hostname newname
# /etc/hosts changes should not be needed, if hostnames are properly configured (dnsmasq DNS -or- work DNS will provide resolution)

(Optional) Set up user m

"Lite" OS installs will not add a user for you, so if you don't have user m, add user m now.

(Optional) Limit system log size

Prevent endless system logging here.

Set up IP

On home lan, bitpost dnsmasq doles out the ips based on MAC: 

hostname # make note
ip address # make note of MAC - there may be more than one (eg: wired and wifi)
[bitpost#] emacs config/etc/dnsmasq.d/mdm_lan_dnsmasq.conf && sudo service dnsmasq restart
# reacquire IP on new box

Copy ssh keys

sudo apt install openssh-server # if needed (usually)
ssh newbox # via password
# 2022 keys
mkdir -p .ssh/2022
[bitpost#] scp -r .ssh/2022/id_ed25519* newguy:.ssh/2022/
cd .ssh && ln -s 2022/id_ed25519 . && cat 2022/id_ed25519.pub >> authorized_keys

It's time to deprecate this one... 

# 2018 keys
mkdir -p .ssh/2018
[bitpost#] scp -r .ssh/2018/id_rsa* newguy:.ssh/2018/
cd .ssh && ln -s 2018/id_rsa . && cat 2018/id_rsa.pub >> authorized_keys

Install basic tools

sudo apt update && sudo apt upgrade -y && sudo apt autoremove -y

sudo apt install git curl emacs-nox # ubuntu server
sudo apt install git curl emacs     # ubuntu desktop
sudo yum install git curl emacs-nox # centos

Set up scripts

cd && mkdir development && cd development
git clone morosoph:development/scripts.git 
./scripts/setup_linux.sh [desktop|nodesk] # to continue bootstrapping

That's it, get on with your life.

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