free online comma separating tool

https://delim.co/#

agile manifesto

https://agilemanifesto.org/

online courses, programming

free:
https://www.freecodecamp.org/

how to update nodejs in linux

sudo npm cache clean -f
sudo npm install -g n
sudo n stable

how to add iam user in aws

1. User name
2. Access type - select "AWS Management Console access"
3. Console password - Custom password
4. Uncheck - Require password reset
5. Select "Attach existing policies directly"

aws delete an s3 bucket

unable to delete s3 bucket


Login as root user. (Not as any IAM user you might have specified)
Go to the S3 console.
Click on the bucket you want to delete.
Under the "Permissions" tab click on "Bucket Policy"
Click on "Delete"


https://stackoverflow.com/questions/45693897/unable-to-delete-s3-bucket/55721584

hotlinking images, videos and sound

imgur, photobucket
youtube
soundcloud

resize tmux window

https://michaelsoolee.com/resize-tmux-panes/

css improve

https://www.sassmeister.com/

crop picture online

croptofit.com

How to install Golang in Linux

sudo apt-get update
sudo apt-get -y upgrade

cd /tmp
wget https://dl.google.com/go/go1.14.2.linux-amd64.tar.gz
sudo tar -C /usr/local -xzf go1.14.2.linux-amd64.tar.gz

open ~/.profile and add below variable at the end
export GOROOT=/usr/local/go
export GOPATH=$HOME/go
export PATH=$GOPATH/bin:$GOROOT/bin:$PATH

update current shell session
source ~/.profile

go version

write hello.go

package main

import "fmt"

func main() {
 fmt.Printf("hello, world\n")
}

build 

go build hello.go

run

./hello

pathogen.vim nerdtree

mkdir -p ~/.vim/autoload ~/.vim/bundle

curl -LSso ~/.vim/autoload/pathogen.vim https://tpo.pe/pathogen.vim


add in .vimrc

execute pathogen#infect()

syntax on

filetype plugin indent on


git clone https://github.com/preservim/nerdtree.git ~/.vim/bundle/nerdtree

reference:
https://github.com/tpope/vim-pathogen

There was an error when attempting to rsync a synced folder.

VBoxManage.exe: error: Call to WHvSetupPartition failed: ERROR_SUCCESS

Another possible solution:
It's possible 13/04/2020 :)

bcdedit /set hypervisorlaunchtype off

and make sure Hyper-V and Windows Sandbox are disabled in Windows Features (which you can get to by entering OptionalFeatures.exe at a command prompt, or via the Control Panel).

Also, Virtualisation options should be enabled in the BIOS, and I think (I don't have time to test right now) that "Virtual Machine Platform" and "Windows Hypervisor Platform" should be enabled.

VirtualBox 6.0.14, Windows Version 10.0.18362.356.

https://stackoverflow.com/questions/58031941/how-to-get-oracle-vm-virtualbox-6-0-and-wsl-working-at-the-same-time

How to install Jekyll

sudo apt-get install ruby-full
sudo apt-get install rubygems build-essential

sudo apt-get install gcc

sudo apt-get install make

sudo gem install jekyll bundler

all the above commands are not working and I don't know why ????

Luckily I found this solution 

https://stackoverflow.com/questions/34521806/installing-jekyll-on-ubuntu-14-04/34523631#34523631

jekyll new blog

cd blog

bundle exec jekyll serve

EUREKA!!!

How to Check Ubuntu Version from the Command Line

lsb_release -a
https://linuxize.com/post/how-to-check-your-ubuntu-version/

running simple django application in aws

By default, only SSH has been enabled in the security for the fresh server in AWS


Change the security group








Add another rule for port 8000



Viola


Installing Supervisor
sudo apt-get install -y supervisor

in /etc/supervisor/conf.d create gunicorn.conf file

sudo mkdir /var/log/gunicorn
sudo supervisorctl reread
sudo supervisorctl update
sudo supervisorctl status

in /etc/nginx/sites-available create django-simple.conf file



sudo nginx -t
sudo ln django-simple.conf /etc/nginx/sites-enabled/



static files and image were not loaded properly



add this line



sudo systemctl nginx reload

creating new python environment using venv

sudo apt-get install python3-venv
python3 -m venv env
apt-get install python3-venv

create new key pair

when creating AMI, you have option to select existing key pair or create a new one

after creating the AMI, the key name value is showing in the list

when you encounter this problem, just reference this link https://unix.stackexchange.com/questions/115838/what-is-the-right-file-permission-for-a-pem-file-to-ssh-and-scp

aws

solution on connecting ssh 
https://unix.stackexchange.com/questions/115838/what-is-the-right-file-permission-for-a-pem-file-to-ssh-and-scp

fix the security problem in ec2
sudo yum update
before:
aws-cli/1.16.102 Python/2.7.16 Linux/4.14.138-89.102.amzn1.x86_64 botocore/1.12.92
sudo pip install --upgrade awscli
after:
aws-cli/1.16.309 Python/2.7.16 Linux/4.14.138-89.102.amzn1.x86_64 botocore/1.13.45

commands
aws iam list-users
aws iam create-user --user-name Lynard
aws iam list-policies
aws iam attach-user-policy --user-name Lynard --policy-arn arn:aws:iam::aws:policy/AdministratorAccess
aws iam list-attached-user-policies --user-name Lynard
aws iam add-user-to-group --user-name Lynard --group-name Marketing
aws iam get-group --group-name Marketing
aws iam remove-user-from-group --user-name Lynard --group-name Marketing
aws iam detach-user-policy --user-name Lynard --policy-arn arn:aws:iam::aws:policy/AdministratorAccess
aws iam delete-user --user-name Lynard

groups
aws iam create-group --group-name Accounting
aws iam attach-group-policy --policy-arn arn:aws:iam::aws:policy/AmazonDynamoDBFullAccess --group-name Accounting
aws iam list-attached-group-policies --group-name Accounting
aws iam detach-group-policy --group-name Accounting --policy-arn arn:aws:iam::aws:policy/AmazonDynamoDBFullAccess
aws iam delete-group --group-name Accounting
aws iam list-groups