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Hide Files Inside Images in Ubuntu Using Steganography - Steps to do it ?

This article covers how to hide files inside images through four different methods including both the command line and the graphical methods. 

You can simply embed the confidential data, along with a password or passkey so that only a trusted person can open that file. 

This type of encryption where you hide one file securely into another is called Steganography.


How to install Steghide utility via command line on Ubuntu ?

1. To install the latest version of this tool, open the Ubuntu Terminal and first update your repository index through the following command as sudo:

$ sudo apt update

2. Now install the steghide utility through the following command:

$ sudo apt-get install steghide


To Remove / Uninstall Steghide tool from Debian:

Whenever you want to uninstall the Steghide tool from your system, simply enter the following command as sudo:

$ sudo apt-get remove steghide


Install FileZilla on Debian 10 - Step by Step process ?

This article covers the installation of FileZilla on Debian 10. FileZilla is a powerful open-source FTP client that comes in handy when you simply want to access your FTP server and manage files.


To install FileZilla on Debian Linux System:

1. Login to the Debian 10 system and run below apt command to update package index:

$ sudo apt update

2. Install FileZilla using command-line, run following apt command:

$ sudo apt install -y filezilla

3. Once FileZilla and its dependencies are installed successfully, run below command to verify the FileZilla version:

$ filezilla --version


Password Protect a File Using Vim on Ubuntu - Step by Step process ?

This article covers how to password protect a file using Vim on Linux.  When password protecting a file, make sure you remember it, or else you will not be able to access your file.

You can also use a password management software if you find it difficult to remember passwords. Or visit our guide on how to install Teampass password manager on Ubuntu .

Always remember to appropriately secure text files that could contain secret info such as usernames and passwords, financial account info and so on, using strong encryption and a password.


To install VIM in Linux:

Vim is available in the repositories of most major distributions. 

So, use your distribution package manager to get installed.

For Debian based systems, use apt-get or apt package manager to install vim.

$ sudo apt-get install vim

For RHEL/CentOS based systems, use yum package manager to install vim.

$ sudo yum install vim-enhanced

For Fedora system, use dnf package manager to install vim.

$ sudo dnf install vim-enhanced

For openSUSE system, use zypper package manager to install pass.

$ sudo zypper in vim

For Arch Linux based systems, use pacman package manager to install vim.

$ sudo pacman -S vim


Install Arduino IDE on Debian 10 - Step by Step Process to implement it ?

This article covers different methods to install the Arduino IDE on Debian system. To get the latest version of Arduino IDE, simply go for installation via tarball and snap. If you prefer an older release of Arduino, go for installation via apt.

Arduino boards are able to read inputs – light on a sensor, a finger on a button, or a Twitter message – and turn it into an output – activating a motor, turning on an LED, publishing something online. You can tell your board what to do by sending a set of instructions to the microcontroller on the board. 

To do so you use the Arduino programming language (based on Wiring), and the Arduino Software (IDE), based on Processing.”


To Install Arduino IDE on Ubuntu:

1. Execute the command:

$ sudo apt install Arduino

2. You will be provided with Y/N option, press y to continue.

3. Now wait for a while until the installation of Arduino IDE is completed.


To Launch Arduino IDE:

To launch Arduino IDE application on your system, hit the super key and in the search bar that appears, type Arduino. When the Arduino IDE icon appears, click on it to launch.

You will see the default view of Arduino IDE.


Install Spotify on Ubuntu 20.04 - Step by Step process to do it ?

This article covers the different methods of installation of Spotify on the Ubuntu 20.04 system. 

Spotify is a Popular music streaming application used globally and users can use any of the methods discussed above for its installation. 

The uninstallation process is also quite easy and we covered it for the ease of our readers. 

Users can also update Spotify with each newly released version.


Where is Spotify installed Linux?

If you followed the instructions on https://www.spotify.com/download/linux/ and installed from Ubuntu Software or snap, it should be located at /snap/bin/spotify . 

If you installed the debian package, it should be located at /usr/bin/spotify .


To update Spotify on Ubuntu:

1. Update list of available packages:

$ sudo apt-get update.

2. Install Spotify:

$ sudo apt-get install spotify-client.


To uninstall Spotify on Linux:

1. Quit Spotify.

2. Uninstall. sudo apt-get remove spotify-client.

3. Remove old config and cache.

cd $HOME/.config. rm -r spotify. cd $HOME/.cache. rm -r spotify.

4. Reinstall by following instructions on https://www.spotify.com/download/linux. 


To Install via command line on Ubuntu:

If you don't have access or don't want to use Ubuntu Software, it is possible to install Spotify from the command line with snap. 

Run the following command in your terminal:

$ snap install spotify


Install MariaDB on CentOS 8 - Step by step process ?

This article will guide you on how to install MariaDB on your CentOS 8 system. Now you can create new databases and grant privileges to other database users. Also, you can add users and create new databases for web or desktop applications which will be written in PHP, Python, and so on.

In MariaDB replication is faster whereas in MySQL replication is slower. 

MariaDB is Open Source whereas MySQL uses some proprietary code in its Enterprise Edition. 

MariaDB doesn't support Data Masking and Dynamic column while MySQL supports it. Comparatively MariaDB is faster than MySQL.


To uninstall MariaDB and install mysql:

1. Purge mariadb sudo apt purge mariadb-* Remove all databases ('Yes' answer)

2. Purge mysql sudo apt purge mysql-*

3. Remove folders: sudo rm -r /usr/share/mysql/ sudo rm -r /etc/mysql/ sudo rm -r /lib/systemd/system/mysql.service.

4. Now you can try to install oracle mysql: sudo apt install mysql-server.


Configure Static IP in Debian 10 - Step by step process to do it ?

This article will guide you on the how to set up a static IP configuration in #Debian 10. Using either the command line or #GUI method, you can easily configure the static IP address on your system.

The ifconfig utility is used to change the IP address of a network interface.

To change your #IP address on #Linux, use the “ifconfig” command followed by the name of your network interface and the new IP address to be changed on your computer. 

To assign the subnet #mask, you can either add a “netmask” clause followed by the subnet mask or use the CIDR notation directly.

To Configure static IP address on Ubuntu 16.04 LTS Server:

1. Edit the /network/interfaces file. sudo nano /etc/network/interfaces.

2. Restart the networking service (or reboot) Once you are confident the change has been made, and if you don't want to reboot you can just restart the networking service.

To Display Available Network Interfaces in Linux:

i. ip #command – It is used to show or manipulate routing, devices, policy routing and tunnels.

ii. #netstat command – It is used to display network connections, routing tables, interface statistics, masquerade connections, and multicast memberships.

iii. #ifconfig command – It is used to display or configure a network interface.


Methods to Log Out of Debian 10 ?

This article will guide you on how you can log out from your Debian 10 system. Here, you will learn the different methods of logging out of a #Debian system. 

exit command in #linux is used to exit the shell where it is currently running. 

It takes one more parameter as [N] and exits the shell with a return of status N. 

If n is not provided, then it simply returns the status of last #command that is executed. Syntax: exit [n].

pkill is a command-line utility that sends signals to the processes of a running program based on given criteria. 

The processes can be specified by their full or partial names, a user running the process, or other attributes.


Methods to Log Out of Linux Mint 20 ?

This article will guide you on methods to logout from the Linux #Mint. Based on your convenience, you can use either the keyboard shortcut or the system menu to logout from your session. When you use a terminal or if you log in to an #Ubuntu system via #SSH, you open a shell session. If you want to logout from your session, you simply exit the #shell. This is why the exit command is equivalent to log out command in Linux.

To switch users in #Linux:

The su command lets you switch the current user to any other user. 

If you need to run a command as a different (non-root) user, use the –l [username] option to specify the user account. 

Additionally, su can also be used to change to a different shell interpreter on a go.


Listing Users in Linux - How to do it ?

This article will guide you on the different methods to list down all the Linux system users. To know whether a particular user is having sudo access or not, we can use -l and -U options together. For example, If the user has sudo access, it will print the level of #sudo access for that particular user. 

If the user don't have sudo access, it will print that user is not allowed to run sudo on localhost.

To change users in #Linux:

The su command lets you switch the current user to any other user. 

If you need to run a command as a different (non-root) user, use the –l [username] option to specify the user account. 

Additionally, su can also be used to change to a different shell interpreter on the fly.


Steps by step process to install VLC media player on Ubuntu 20.04 LTS ?

This article will guide you on different installation methods for the VLC. We have also seen how we can uninstall this streaming #software from the system when it is not needed.

VLC Media Player is one of the most well known and arguably best media players available for any platform, including Windows. #VLC can also help you convert video files from one format to another, save YouTube videos for offline playback, and record your own videos using your webcam.

Using #Linux #Terminal to Install VLC in #Ubuntu:

1. Click on Show Applications.

2. Search for and launch Terminal.

3. Type the command: sudo snap install VLC .

4. Provide the sudo password for authentication.

VLC will be downloaded and installed automatically.


Step by step process to Install the latest MySQL on Debian 10 ?

This article will guide you on how to #install #MySQL server on Debian 10 #Linux system. Also we looked into how to secure the installation and connect with the MySQL shell. Using the Validate password #plugin you can make a more secure database MySQL password #authentication.

MySQL is an #RDBMS tostore, retrieve, modify and administrate a database usingSQL.

The mysql #command:

1. -h followed by the server host name (server.linuxapt.com).

2. -u followed by the account user name (use your MySQL username).

3. -p which tells mysql to prompt for a password.

4. database the name of the database (use your database name).


How to install and configure DHCP server on Linux ?

This article will guide you on steps to install and configure the #DHCP #server in the Linux system and assign dynamic and fixed #IP addresses to the clients. It takes just a few simple steps to configure the DHCP server in a #Linux machine. Once you have configured it, it will automatically assign the assigning IP addresses and related information to each machine on the network.

The main DHCP #configuration file is /etc/dhcp/dhcpd. conf. The file is used to store the network configuration information required by DHCP #clients.

To enable DHCP or change other TCP/IP settings:

1. Select Start , then select Settings > #Network & Internet.

2. Do one of the following: For a Wi-Fi network, select Wi-Fi > Manage known networks.

3. Under IP assignment, select Edit.

4. Under Edit IP settings, select Automatic (DHCP) or Manual.

5. When you're done, select Save.


Steps to create and run a C program using Ubuntu 20.04 LTS ?

This article will guide you on steps to write your first C #program. Hello World! the program may seem useless and simple, but it is the best way to get started on learning how to program. By writing this yourself, you better under concepts that may otherwise seem abstract and vague. To run C program: Open #Command #prompt or Terminal(if you use #Ubuntu or Mac OS), and go to the directory where you have saved the hello. c program file. Now, to run the program, type in ./a. out and you will see Hello, World displayed on your screen. To compile and run a C program on Ubuntu Linux using the gcc compiler: 1. Open up a #terminal. Search for the terminal application in the Dash tool (located as the topmost item in the Launcher). 2. Use a text editor to create the C source code. 3. #Compile the program. 4. Execute the program.


How to Delete a Directory and folder in Linux?

This article will guide you on how to delete a #directory in #Linux using the #rm, rmdir and find commands. It is quite easy to delete a directory in Linux whether it contains files and other #subdirectories, or simply if it is empty. To delete (i.e. remove) a directory and all the sub-directories and files that it contains, navigate to its parent directory, and then use the command rm -r followed by the name of the directory you want to delete (e.g. rm -r directory-name ). The “-rf” flag, along with the “rm” command, removes a directory recursively without prompting the user for confirmation.


Different Methods to Mount a Drive in Linux ?

This article will guide you on how to use the #mount and #umount command to attach and detach various file systems. You can perform this task on several media options like ISO file, NFS share and USB flash drive. Mounting will not erase everything. The #disk does get modified slightly each time you mount it, though. However, since you have serious directory corruption which cannot be repaired by Disk Utility you need to repair and replace the directory before it can be mounted.


Steps to save a file in Linux command line

This article will guide you on how to use the #cat #command to display or create a new file on #Linux. To save a file, you must first be in Command mode. Press Esc to enter Command mode, and then type :wq to write and quit the file. The other, quicker option is to use the keyboard shortcut ZZ to write and quit.


Install and Configure VNC on Ubuntu 20.04 - Steps to do it.

This article will guide you on the steps to set up a secured VNC server up and running on your Ubuntu 20.04 server. This will help you to manage your files, software, and settings with a user-friendly graphical interface, and you will be able to run graphical software like web browsers remotely.


Different apt commands which you can use in Ubuntu and Debian Servers

This article will show you the different ways to use apt commands with practical examples.


How to Check if your Linux Memory usage is running out

It is vital for you to check if your Linux memory is running low to help your server to stay optimized.