#linux videos

Directories and their role

As you already know, in Windows just after the install there are a few standard directories like: Windows, Program Files, Documents and Settings/Users. In Linux a similar structure exists but with much more directories. I will present you below the most important ones:

/home = contains user’s personal folders and files

/root = contains the files and folders of root user

/dev = special files for…

Using help in Linux

Before you start this tutorial is better to know how to get help and details about the commands, when you need it. There are several ways to get help about the commands, but I will present only the most important ones:

Using –help as argument for the command

Example: cp –help

Using man as a pre-argument for the command

Example: man cp

Using info as a pre-argument for the command

Example: info cp

Linux Beginner’s Guide Part 6

Network Configuration

The ifconfig command is used to view the current network configuration for ethernet cards and iwconfig displays the network configuration for wireless cards.

ifconfig [OPTIONS]

iwconfig [OPTIONS]

Because this is the output from a Virtual Machine the ethernet is called enp0s3, on hardware machines is eth0.

The lo (loopback) interface is a software device used by the…

Linux Beginner’s Guide Part 5

Installing Packages/Applications/Software

The yum command is used to install new packages and to update/upgrade the operating system, it requires administrative access, so it must be used with sudo.

yum [OPTIONS] [COMMAND]

The operating system must be updated on a regular basis, this way you will keep your data and integrity of the system safe. In order to update your system, run one of the…

Linux Beginner’s Guide Part 4

Filtering Input

grep command is a text filter that searches for the input and returns the text lines by a given pattern.

grep [OPTIONS] [PATTERN] [FILE]

In order to start the example, use the following command to get to the /Documents/ folder: cd ~/Documents and then copy the file on which we will make tests, to the current directory: cp /etc/passwd . (note the dot, it’s important!) next, run the…

Linux Beginner’s Guide Part 3

Working With Files

Moving Files

The mv command is used to move a file from a place to another one. The mv command can have two arguments: source and destination. The source is the place where the file is located and destination is the place where the file should be moved.

mv [SOURCE] [DESTINATION]

Switch to the Documents directory:

cd ~/Documents

Move test.sh file into Work directory, the file is…

How to add a user to sudoers

Separation of privileges are a security measure implemented in Linux systems. Regular/normal users operate with limited privileges in order  to reduce their influence in the system environment that they use. This is a security method to reduce the impact of regular users on the system.

In Linux a root user exist which has super-user access/privileges. This is an administrative account that has no…

Linux Beginner’s Guide Part 2

Administrative Access

Many Linux commands deal with sensitive data like system hardware, passwords or operate under exceptional circumstances. Prevents regular users from executing these commands by mistakes and helps to protect data and system integrity. By logging in as root enables the ability to execute privileged commands.

SuperUser su Command

The su command, if it’s not mentioned any…