andmax

[user]
	name = Andre Maximo
	email = andmax@gmail.com
[credential]
	helper = cache --timeout=3600
[core]
	editor = emacs -nw
[filter "lfs"]
	required = true
	clean = git-lfs clean -- %f

andmax

- To properly use github, it is important to add SSH and GPG keys
- to respectively connect (allowing git push/pull/clone) to github and
- sign commits (allowing git commit -S) adding a "verified" tag to it

- Using SSH key to connect sometimes requires to go thru port 443 instead of
- port 22 when accessing github:

- Edit ssh config to use port 443 https when accessing github via ssh
- and also to use ssh key (must be the same added in github):

andmax

#!/usr/bin/bash

echo 'clearing dmesg...';
sudo dmesg -c && clear;
DEVICE=$(rfkill list all | grep -o 'hci*.');
sudo hciconfig ${DEVICE} down;
sudo rmmod btusb;
sudo service bluetooth disable;

sudo modprobe btusb;

andmax

# Good run x times function to have readily available in cmd line to
# just do: $ runx 10 cmd args <- run 10 times cmd with args
function runx() {
   for ((n=0;n<$1;n++))
     do ${*:2}
   done
}

# The py_envs can help add a python path before running python or jupyter
# It is used as $ py_envs jupyter notebook

andmax

1. Image viewer: https://feh.finalrewind.org/

andmax

Python virtual environments (venv) are good to:

1. Use a specific version of Python;
2. Do pip install rightly (without sudo);
3. Be able to use other Python versions as jupyter notebook run kernel.

It is the recommended way of organizing packages versions in Python 3.3+.
To create/activate/deactivate a venv:

python3.8 -m venv ~/python3.8-venv

andmax

Install clangd to have IDE support in emacs:
https://clangd.llvm.org/

Add following snippet to ~/.emacs:
(require 'eglot)                                                                                                                                                                                                                                                                     
(add-to-list 'eglot-server-programs '((c++-mode c-mode) "clangd"))                                                                                                                                                                                                                   
(add-hook 'c-mode-hook 'eglot-ensure)                                                                                                                                                                                                                                                
(add-hook 'c++-mode-hook 'eglot-ensure)

Create file ~/.clangd with:

andmax

0. A better option than below guidelines is to install OpenCV in Python via:

pip install opencv-python
sudo apt update
sudo apt install libgl1

1. Remove opencv installed by apt (probably not the most recent version)
2. Clean-up and update apt (so dependencies can be installed)
3. Install dependencies
4. Set gcc/g++ to maximum allowed version (8 for cuda-10.2)

andmax

.ssh/config:
Host *
  (...)
  AddKeysToAgent yes
  (...)

eval `ssh-agent`
ssh-copy-id -i ~/.ssh/id_rsa.pub node:
ssh node

andmax

# Fresh install Docker + avoid VPN conflict
sudo rm -rf /etc/docker/*
sudo apt-get remove --purge *docker*
sudo apt-get autoremove
sudo apt-get autoclean
sudo apt update
sudo apt install apt-transport-https ca-certificates curl software-properties-common
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu focal stable"
sudo apt update