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prereq: pip3 should be installed

sudo -H pip3 install jupyter

installing jupyterlab in conda

conda install -c conda-forge jupyterlab

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url: https://docs.conda.io/en/latest/index.html

miniconda is a minimum installer for conda

installation

donload linux sh installer for a specific python version from https://docs.conda.io/en/latest/miniconda.html e.g. for python 3.8

chmod +x ~/Downloads/Miniconda*.sh
sudo ~/Downloads/Miniconda3-latest-Linux-x86_64.sh 

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https://course19.fast.ai/start_aws.html

applied to fast.ai v2 taken from setup of aws ec2

git clone https://github.com/fastai/course-v3

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install nvidia drivers from standard ubuntu repository

GNOME GUI Nvidia installation Method

The easiest, recommended in most cases

• Select Software & Updates app,
• Click on Additional drivers
• Choose any proprietary drifver, the higher number correspons to a later version

check driver version

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#Adding ssh pub key to your github account

prereq. you should posess or generate a host's ssh key

on windows

$ clip < ~/.ssh/id_ed25519.pub
# Copies the contents of the id_ed25519.pub file to your clipboard

in github account

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Root cron

/etc/crontab

user-created crontables ubuntu

/var/spool/cron/crontabs

Anatomy of a crontab file

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from https://www.techomoro.com/install-and-set-up-angular-on-ubuntu/

install nodejs

curl -sL https://deb.nodesource.com/setup_14.x | sudo -E bash - sudo apt-get install -y nodejs

install npm

sudo apt-get intstall npm

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url to configure google drive: https://rclone.org/drive/

see existing configuration, reconfigure rclone config

#see top dir listing rclone lsd remotename:

#see contents of a subfolder

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package packt.j9fprog.genericMethods;

import java.util.List;

public class GenPair<K,V> {
    private final K left;
    private final V right;
    public GenPair(K left, V right) {
        this.left = left;
        this.right = right;

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Java difference between hashtable and hashmap

Hashtable is synchronized , Hashmap is not

Hashtable does not allow null keys or values

HashMap allows one null key and any number of null values