Somajit SomajitDey

sudo echo hi # This sudo is to accept the current password, so that it won't ask for password for next few minutes
echo "$USER ALL=(ALL:ALL) NOPASSWD: ALL" | sudo tee /etc/sudoers.d/$USER

To restore the default behavior of sudo asking for password just remove the /etc/sudoers.d/$USER file

In this tutorial we shall setup VNC such that we can remotely access a Linux desktop (Ubuntu 20.04) from a Windows 10 laptop. The Ubuntu desktop hosts the VNC server, whereas the Windows machine hosts the client.

Ref :

Server

sudo apt update

Sudo without password
Setup necessary aliases in your server's .bashrc
- alias x="nautilus ${PWD}" ; so that file explorer opens in current directory with command x
- alias ls="ls -lt"
Seup git config name and email at your server
Setup terminal preferences
Networking
- Expose server with tunnel. Make use of cron: crontab -e > @reboot tunnel -l /tmp/tunnel.log 22 and */1 * * * * tunnel -l /tmp/tunnel.log 22. Use tunnel because it is more or less portable and doesn't require sudo priviledge. Just install a portable socat in the same directory as tunnel (e.g. ~/.bin), if needed.
- At your home-pc/laptop (client) setup a cronjob or add to ~/.bashrc : flock -n /tmp/tunnel.log tunnel -b <port> -l /tmp/tunnel.log <server-kid>:22

Letting Ubuntu bash on Windows 10 run 'ssh -X' to get a GUI environment on a remote server

First

Install all the following. On Window, install Xming. On Ubuntu bash, use sudo apt install to install ssh xauth xorg.

sudo apt install ssh xauth xorg

How to use Anydesk to connect to remote network with low bandwidth usage

Anydesk is usually used for accessing remote desktop, viz. the entire GUI shell. This, however, uses a lot of data. If one wants to simply run commands remotely, then it's more efficient to use SSH by using Anydesk's TCP tunneling feature. TCP tunnelling also gives access to remote's network provided a SQUID web proxy is running @ remote, thus setting up a VPN effectively. Anydesk offers only one TCP tunneling in its FREE license.

To set up SSH, for example, to a Remote Linux server do the following:

Setup Anydesk server in remote. Make sure Create TCP tunnels is checked in Settings > Permissions.
Open Anydesk client in your Windows computer.
Sign in to your Anydesk Account, otherwise TCP tunneling would be greyed out.

Give your Personal Access Token (PAT) access to workflow.
Put the accompanying build.yml inside .github/workflows path inside your repository. Edit it as required. You may check the validity of the yaml file online.
On top of your repository's README.md, put the following badge:

[![CI Build Status](https://github.com/<OWNER>/<REPO>/actions/workflows/build.yml/badge.svg)](https://github.com/<OWNER>/<REPO>/actions/workflows/build.yml)

Add, Commit and Push
See results of GitHub Actions @ https://github.com///actions/workflows/build.yml

###AnyDesk - How Enable Remote Access from ubuntu/debian terminal.

Note:

Here are the commands might be usefull in this purpose:

anydesk --get-status : To get current status of anydesk, which might be offlien,online or nothing.
anydesk --get-id : To get the ID that your system can be accessed by.
anydesk --service : To start anydesk service if not already running (for Linux).
anydesk --restart-service : To restart anydesk service
anydesk --stop-service : To stop anydesk service

	# NOTE: You may simply put this config file inside /etc/ssh_config.d directory.
	# Ref : https://www.howtogeek.com/75007/stupid-geek-tricks-use-your-ssh-config-file-to-create-aliases-for-hosts/
	# To create ssh-keys easily use `ssh-keygen` @client followed by `ssh-copy-id server`
	Host <alias>
	User <uid>
	HostName <ip or hostname>
	Port <port>
	IdentityFile <~/.ssh/your_saved_key> # for passwordless login
	ServerAliveInterval 120
	ServerAliveCountMax 30

	# Disable all of make's built-in rules (similar to Fortran's implicit none)
	MAKEFLAGS += --no-builtin-rules --no-builtin-variables

	# Fortran Compiler
	FC := gfortran

	# The following must have non-empty value if OpenMP is required
	OMP :=

	# The following must have non-empty value if Debugging compiler options are required

	die() { echo "$*" >&2; exit 2; } # complain to STDERR and exit with error
	needs_arg() { if [ -z "$OPTARG" ]; then die "No arg for --$OPT option"; fi; }

	while getopts ab:c:-: OPT; do
	# support long options: https://stackoverflow.com/a/28466267/519360
	if [ "$OPT" = "-" ]; then # long option: reformulate OPT and OPTARG
	OPT="${OPTARG%%=*}" # extract long option name
	OPTARG="${OPTARG#$OPT}" # extract long option argument (may be empty)
	OPTARG="${OPTARG#=}" # if long option argument, remove assigning `=`
	fi