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There are 3 types of users in Linux.

1. Regular
2. Administrative(root)
3. Service

Regular User

A regular user account is created for you when you install Ubuntu on your system. All your files and folders are stored in /home/ which is your home directory. As a regular user, you do not have access to directories of other users.

Root User

Other than your regular account another user account called root is created at the time of installation. The root account is a superuser who can access restricted files, install software and has administrative privileges. Whenever you want to install software, make changes to system files or perform any administrative task on Linux; you need to log in as a root user. Otherwise, for general tasks like playing music and browsing the internet, you can use your regular account.

Service user

Linux is widely used as a Server Operating System. Services such as Apache, Squid, email, etc. have their own individual service accounts.  Having service accounts increases the security of your computer. Linux can allow or deny access to various resources depending on the service.

Note:

1. You will not see service accounts in Ubuntu Desktop version.
2. Regular accounts are called standard accounts in Ubuntu Desktop

In Windows, there are 4 types of user account types.

1. Administrator
2. Standard
3. Child
4. Guest

In Microsoft Windows, files are stored in folders on different data drives like C: D: E:

But, in Linux, files are ordered in a tree structure starting with the root directory.

This root directory can be considered as the start of the file system, and it further branches out various other subdirectories. The root is denoted with a forward slash ‘/’.

Types of Files

In Linux and UNIX, everything is a file. Directories are files, files are files, and devices like Printer, mouse, keyboard etc.are files.

Let’s look into the File types in more detail.

General Files

General Files also called as Ordinary files. They can contain image, video, program or simply text. They can be in ASCII or a Binary format. These are the most commonly used files by Linux Users.

Directory Files

These files are a warehouse for other file types. You can have a directory file within a directory (sub-directory).You can take them as ‘Folders’ found in Windows operating system.

Device Files:

In MS Windows, devices like Printers, CD-ROM, and hard drives are represented as drive letters like G: H:. In Linux, there are represented as files.For example, if the first SATA hard drive had three primary partitions, they would be named and numbered as /dev/sda1, /dev/sda2 and /dev/sda3.

Note: All device files reside in the directory /dev/

All the above file types (including devices) have permissions, which allow a user to read, edit or execute (run) them. This is a powerful Linux/Unix feature. Access restrictions can be applied for different kinds of users, by changing permissions.

HTTPS or Secure HTTP is an encryption method that secures the connection between users’ browser and your server. This makes it harder for hackers to eavesdrop on the connection.

Every day we share our personal information with different websites whether it’s making a purchase or simply logging in.

In order to protect the data transfer, a secure connection needs to be created.

That’s when SSL and HTTPS come in.

Each site is issued a unique SSL certificate for identification purposes. If a server is pretending to be on HTTPS, and its certificate doesn’t match, then most modern browsers will warn the user from connecting to the website.

Now you are probably wondering, why do I need to move my WordPress site from HTTP to HTTPS specially if it’s a simple blog or small business websitethat doesn’t collect any payments.

Why do you need HTTPS and SSL?

Last year Google announced a plan to improve overall web security by encouraging website owners to make the switch from HTTP to HTTPS. As part of this plan, their popular Chrome web browser would mark all websites without a SSL certificate as “Not Secure” starting July 2018.

As part of the announcement, Google also said that websites with SSL will also see SEO benefits and higher rankings. Since last year, a large number of websites have switched from HTTP to HTTPS.

Google has been slowly rolling out the “Not Secure” warning in Chrome. For example, if someone visits a HTTP website using the incognito window, it will be marked as Not Secure. If someone visits a HTTP website on regular mode and tries to fill out a contact form or another form, then the website will be marked as insecure.

When your readers and customers see this notice, it gives them a bad impression for your business.

This is why all websites need to move form HTTP to HTTPS and install SSL immediately.