Satish Kumar


  • Linux Concept

    This Blog is for Linux Lover, we are providing tutorial content on Linux Operating system and Open Source Application.


  • SELinux and PAM

    With all the information about SELinux users and roles, we have not touched upon how exactly applications or services create and assign an SELinux context to a... Read more

    Posted on 04 June 2021
  • Handling SELinux Roles

    We saw how SELinux users define the role(s) that a user can hold. But how does SELinux enforce which role a user logs in through? And when logged in, how can a... Read more

    Posted on 03 June 2021
  • How to Install VirtualBox on Ubuntu 21.04 Linux

    Install VirtualBox Ubuntu 21.04 Linux

    VirtualBox is an Open Source tool, known as a cross-platform virtualization application or software. It used to run multiple operating systems or virtual... Read more

    Posted on 03 June 2021
  • SELinux Users and Roles

    SELinux Users Roles

    In SELinux-enabled environments, the login binary calls the libselinux API to establish the initial mapping between SELinux users and local users. Read more

    Posted on 02 June 2021
  • User-oriented SELinux Contexts

    Once logged in to a system, our user will run inside a certain context. This user context defines the rights and privileges that we, as a user, have on the... Read more

    Posted on 01 June 2021
  • Getting Help with Denials for SELinux

    On some distributions, additional support tools are available that help us identify the cause of a denial. These tools have some knowledge of common mistakes... Read more

    Posted on 31 May 2021
  • SELinux Logging and Auditing

    SELinux Logging Auditing

    SELinux developers understand that a security-oriented subsystem such as SELinux can only succeed if it is capable of enhanced logging and—even—debugging. Read more

    Posted on 30 May 2021
  • Switching SELinux on and off

    This is perhaps a weird section to begin with, but disabling SELinux is a commonly requested activity. Some vendors do not support their application running on ... Read more

    Posted on 29 May 2021
  • Using Grep Command in CentOS for Text Matching

    Using Grep Command CentOS Text Matching

    Grep (short for GlobalRegular Expression Print) is a command that is used extensively to as a text search tool in text files. It searches for a pattern in a fil... Read more

    Posted on 28 May 2021
  • Redirecting Output to Files and Programs in CentOS Linux

    When we execute any program, by default, its output or error is displayed on the screen. We can redirect the text output of a program to a file using the... Read more

    Posted on 27 May 2021
  • Using Text File Manipulation Tools in CentOS Linux

    Using Text File Manipulation Tools CentOS Linux

    System administrators, developers, and users need to work with text files, configuration files, and log files when working on Linux. Some of these files are... Read more

    Posted on 26 May 2021
  • Distinguishing Between SELinux Policies

    The most common SELinux policy store names are strict, targeted, mcs, and mls. None of the names assigned to policy stores are fixed though, so it is a matter o... Read more

    Posted on 25 May 2021
  • Defining and Distributing SELinux Policies

    Defining Distributing SELinux Policies

    Enabling SELinux does not automatically start the enforcement of access. If SELinux is enabled and it cannot find a policy, it will refuse to start because the... Read more

    Posted on 24 May 2021
  • Labeling All Resources and Objects

    Labeling Resources Objects

    When SELinux has to decide whether it has to allow or deny a particular action, it makes a decision based on the context of both the subject (who is initiating... Read more

    Posted on 23 May 2021
  • Providing More Security for Linux

    Providing More Security Linux

    Seasoned Linux administrators and security engineers already know that they need to put some trust in the users and processes of their system in order for the... Read more

    Posted on 22 May 2021
  • Editing Files with the Vi Editor

    Editing Files with Editor

    The vi editor is the most popular editor used to edit or create new files from a shell prompt. It comes in text-based as well graphical interface form, with... Read more

    Posted on 21 May 2021
  • Different Methods to Create a Text File

    Different Methods Create Text File

    Text files can be viewed and edited using any text editor that exists in Linux. However, before learning the editing part, we must have a basic understanding... Read more

    Posted on 20 May 2021
  • Managing Archives and Compressed Files

    Managing Archives Compressed Files

    Archiving is the process of fetching multiple files from the same or different locations and putting them into a single file bundle. It is generally... Read more

    Posted on 19 May 2021
  • Managing Files Using Command-line Tools

    Managing Files Using Command-line Tools

    Commands are names of programs installed on the system. Before proceeding with the basic command operation, let’s have a look at the two types of path... Read more

    Posted on 18 May 2021
  • Managing Filenames with Path Expansion

    Managing Filenames with Path Expansion

    In this tutorial, we will see the meta-characters and expansion technique that can improve file management efficiency. File globbing The bash shell can match... Read more

    Posted on 17 May 2021