DEV Community: mohammad hassani

📱 Connecting to Ubuntu Terminal from Android Phone — Step by Step

mohammad hassani — Tue, 01 Jul 2025 15:21:21 +0000

In this guide, you will learn how to connect to the terminal (SSH) of the Ubuntu system via the Internet or local network with your Android phone and also be able to manage connections, receive notifications, or block people from accessing it.

🧩 1. Enabling SSH on Ubuntu

First, SSH must be installed and enabled on the Ubuntu system:

sudo apt update
sudo apt install openssh-server
sudo systemctl enable ssh
sudo systemctl start ssh

To make sure it is enabled:

sudo systemctl status ssh

🌐 2. Finding the system IP

If the phone and the system are on the same network (for example, shared Wi-Fi), get the system's local IP with this command:

hostname -I

You will see an IP like 192.168.1.100.

📲 3. Connecting from an Android phone

Install one of the following SSH client apps on your phone:

Enter the connection information:

Host/IP: Local or public IP of the system
Port: 22
Username: Ubuntu username
Password: User password

And connect easily.

🕵️‍♂️ 4. Find out who is connected?

To see who is connected via SSH:

who

or:

And to see the login history:

last -i

And detailed SSH logs:

sudo journalctl -u ssh

🔔 5. Get notified when someone connects

To get a desktop notification when someone connects via SSH, edit the following file:

sudo nano /etc/ssh/sshrc

and add this line to it (replace user_id with your user ID):

DISPLAY=:0 DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus notify-send "🔐 New SSH connection" "User $(whoami) connected from $(echo $SSH_CONNECTION | awk '{print $1}')."

By saving the file and restarting ssh, you will now get a notification every time someone connects.

⛔ 6. Block or prevent connections

🎯 Kick out current access

Find the PID with:

ps aux | grep sshd

Then:

sudo kill -9 [PID]

🔒 Block the offending IP with UFW

sudo ufw deny from 192.168.1.17

🚫 Prevent specific user login

In the SSH configuration file:

sudo nano /etc/ssh/sshd_config

Add:

DenyUsers ali

And then restart SSH:

sudo systemctl restart ssh

⛔ Close SSH completely

To stop SSH completely:

sudo systemctl stop ssh

And to prevent SSH from running automatically on reboot:

sudo systemctl disable ssh

🌍 Connect via the Internet (if you have a server)

If outside the network Are you local or have a server:

Use services like Tailscale or ZeroTier to connect remotely without any hassle.
Or set up a VPS server and make your home system accessible via Reverse SSH Tunnel.

🧠 Summary

Tools	Applications
`openssh-server`	Setting up SSH on Ubuntu
Termius / JuiceSSH	SSH connection from phone
`who`, `ps`, `ufw`	Checking and controlling connections
`notify-send`	Notify new user login

🔥 Now you can control your Linux system from anywhere with your phone — with complete security and management!

create your own personal web page using Github

mohammad hassani — Sun, 08 May 2022 12:10:08 +0000

If you want to create a personal website for yourself and explain what you do. This article is for you ;)

First of all, you must have a Github account.

Then create a repository whose name is exactly the same as your username + '.github.io'

For example my account name is mohammad-hassani so the repository name will be 'mohammad-hassani.github.io'.

It's optional that you make Readme.md file or not.

After that GitHub will make a website exactly the same as your repository name and you can see your personal web page in browser!

But it's still empty!

If you created the Readme.md file; that will be show in browser and if not; it's a blank page!

Now clone the repository and make an Index.html file in the folder; if you know the basics of html, CSS and JavaScript; then create a beautiful web page and write your personal info ;)

Then push the repository and wait a few seconds until GitHub accept your changes.

Then if you open browser and open your web page you will see your changes!

If you want to link a domain to your web page then create a 'CNAME' file in your repository and write your domain in that ; then link domain to GitHub

If you want help this is an example of my web page:

GitHub repository : github.com/mohammad-hassani/mohammad-hassani.github.io
And my domain: hasani.id.ir

Be happy :)

Import database to docker with terminal

mohammad hassani — Sat, 08 Jan 2022 19:33:04 +0000

Hey, this is Mohammad Hassani 😃

if you are developing with Linux and wanna import database to docker with terminal you can use this tutorial...

It's just 4 steps

1) copy database to _data folder:

first of all you should copy your .sql file to var/lib/docker/volumes/blog_blogmysql/_data

in terminal:

cp DATABASE.sql var/lib/docker/volumes/blog_blogmysql/_data

// Replace DATABASE to your database file name

2) execute docker

now your database is ready to import, in this step execute docker in terminal,
(docker desktop is not supported in Linux but you can install dockstation for Linux, they are similar. and then you can execute there)

also in terminal:

docker exec -it CONTAINERNAME bash

// Replace CONTAINERNAME to your container name like site_mysql_1

3) Bring up mysql

now open mysql in terminal:

mysql -uroot -p DATABASENAME

if you dont have database in container you can use

mysql -uroot -p

and then:

CREATE DATABASE DATABASENAME;

// Replace DATABASENAME to your database name

4) source .sql file

ok! everything is set now and ready to go...
in terminal:

source var/lib/mysql/DATABASE.sql

it maybe take some time depends on your .sql file size and your computer.

better way

you can use this code instead of step 3 and 4:

mysql --init-command="set autocommit=0" DATABASENAME < var/lib/mysql/DATABASE.sql

that's it!

if you have another way, leave a message :)

Be happy! ;)

Hello world in 16 languages

mohammad hassani — Sat, 16 Jan 2021 12:01:31 +0000

Hi I want to show you "hello world" in 16 programming languages

1 C++

int main() {
    std::cout << "Hello world!\n";
}

2 Java

public class Main {
    public static void main(String[] args) {
    system.out.println("Hello world!");
    }
}

3 Python

print "Hello world!"

4 Python3

print("Hello world!")

5 C

#include<stdio.h>

int main(void) {
    puts("Hello World!");
    return 0;
}

6 Csharp

class HelloWorld {
    static void Main() {
        System.Console.WriteLine("Hello World!");
    }
}

7 Javascript

(function main() {
    console.log('Hello World!');
}());

8 TypeScript

(function main() {
    console.log('Hello World!');
}());

9 Ruby

#!/usr/bin/env ruby
puts "Hello World!"

10 Swift

print("Hello world!")

11 Go

func main() {
    fmt.Printf("Hello, World!")
}

12 Bash

echo 'Hello, world'

13 Scala

object Main extends App {
    println("Hello, World!")
}

14 Kotlin

fun main(args: Array<String>) {
    println("Hello, World!")
}

15 Rust

fn main() {
    println!("Hello, World!");
}

16 PHP

echo "Hello world";

Be happy! :)

Do you know about git flow? all in one post!

mohammad hassani — Thu, 31 Dec 2020 00:24:29 +0000

Hi there!
I wanna talk about git power supplement that named git flow!

git-flow are a set of git extensions to provide high-level repository operations for Vincent Driessen's branching model.
in this post I wanna shows the basic usage and effect of git-flow operations

Setup

important! before using git flow you need a working git installation

Setup in mac OS

$ brew install git-flow-avh

Setup in macports

$ port install git-flow-avh

Setup in linux

$ apt-get install git-flow

Setup in windows

$ wget -q -O - --no-check-certificate https://raw.github.com/petervanderdoes/gitflow-avh/develop/contrib/gitflow-installer.sh install stable | bash

Getting started

Git flow needs to be initialized in order to customize your project setup.

Initialize

Start using git-flow by initializing it inside an existing git repository:

git flow init

You'll have to answer a few questions regarding the naming conventions for your branches.
It's recommended to use the default values.

Features

@@Develop new features for upcoming releases@@
@@Typically exist in developers repos only@@

Start a new feature

Development of new features starting from the 'develop' branch.
Start developing a new feature with

git flow feature start MYFEATURE

This action creates a new feature branch based on 'develop' and switches to it

Finish up a feature

Finish the development of a feature. This action performs the following;

Merges MYFEATURE into 'develop'
Removes the feature branch
Switches back to 'develop' branch

git flow feature finish MYFEATURE

Publish a feature

Are you developing a feature in collaboration?
Publish a feature to the remote server so it can be used by other users.

git flow feature publish MYFEATURE

Getting a published feature

Get a feature published by another user.

git flow feature pull origin MYFEATURE

You can track a feature on origin by using

git flow feature track MYFEATURE

Make a release

1.Support preparation of a new production release
2.Allow for minor bug fixes and preparing meta-data for a release

Start a release

To start a release, use the git flow release command. It creates a release branch created from the 'develop' branch.

git flow release start RELEASE [BASE]

You can optionally supply a [BASE] commit sha-1 hash to start the release from. The commit must be on the 'develop' branch.

It's wise to publish the release branch after creating it to allow release commits by other developers. Do it similar to feature publishing with the command:

git flow release publish RELEASE

(You can track a remote release with the
git flow release track RELEASE command)

Finish up a release

Finishing a release is one of the big steps in git branching. It performs several actions:
1.Merges the release branch back into 'master'
2.Tags the release with its name
3.Back-merges the release into 'develop'
4.Removes the release branch

git flow release finish RELEASE

Don't forget to push your tags with git push origin --tags

Hotfixes

1.Hotfixes arise from the necessity to act immediately upon an undesired state of a live production version
2.May be branched off from the corresponding tag on the master branch that marks the production version.

git flow hotfix start

Like the other git flow commands, a hotfix is started with

git flow hotfix start VERSION [BASENAME]

The version argument hereby marks the new hotfix release name. Optionally you can specify a basename to start from.

Finish a hotfix

By finishing a hotfix it gets merged back into develop and master. Additionally, the master merge is tagged with the hotfix version.

git flow hotfix finish VERSION

Commands

Be happy!

How to setup a project using tailwindcss for beginners

mohammad hassani — Wed, 30 Dec 2020 14:11:52 +0000

Hi there!
With tailwindcss you can rapidly build modern websites without ever leaving your HTML.

to start a project using tailwind follow me!

1. Make a folder

if you use linux OS just open you'r terminal and type:

mkdir tailwind_dev

and then go to tailwind_dev folder

cd tailwind_dev

2. Make package.json file

to make package.json file you need npm ;
if you don't have npm just follow this link.
after that,in you'r terminal type

npm init -y

now if you check the tailwind_dev folder; you'll see the package.json file!

3. Install tailwindcss

for install tailwind just type

npm install tailwindcss --save

4. Make public and src folder

now its time to make two folder
in you'r terminal type

mkdir public

and

mkdir src

5. Make css file

first with

cd src

enter to you'r src folder and with

touch style.css

make you'r css file.

6. Make html file

then type

cd ../public

in you'r terminal to enter public folder and type

touch index.html

7. Import basics

open you'r IDE and then open you'r style.css file in src folder and write this codes to import tailwind base,components and utilities

 @tailwind base;
 @tailwind components;
 @tailwind utilities;

save you'r changes !

8. Change package.json for install basics

open you'r package.json file

and replace

"test": "echo \"Error: no test specified\" && exit 1"

with

"build-css": "tailwindcss build -i ./src/style.css -o ./public/style.css"

9. Npm run

it's almost done, just type

npm run build-css

in you'r terminal.
after that, if you check the public folder you can see the style.css that include tailwindcss class !

10. Last thing for done

just open you'r html file and make you'r project,
to link style.css to you'r html file;in head tag write this code:

<link rel="stylesheet" href="style.css">