Satish Kumar

LATEST ARTICLES ( 282 )

• How to Install CouchDB on Ubuntu 21.04 Linux Operating System

  

  The CouchDB is an open-source database system, managed by the Apache Software Foundation. It is fault-tolerant, and schema-free NoSQL database management system. Read more

  Posted on 12 June 2021

• Types, Permissions, and Constraints in SELinux

  Now that we know more about types (for processes, files, and other resources), let’s explore how these are used in the SELinux policy in more detail. Read more

  Posted on 11 June 2021

• Limiting the Scope of Transitions in SELinux

  For security reasons, Linux systems can reduce the ability of processes to gain elevated privileges under certain situations or provide additional constraints t... Read more

  Posted on 10 June 2021

• The Context of a Process in SELinux

  As everything in SELinux works with contexts, even processes are assigned a context, also known as the domain. Let’s see how we can obtain this information,... Read more

  Posted on 09 June 2021

• How to Add Swap Space on Ubuntu 21.04 Operating System

  

  The swap space is a unique space on the disk that is used by the system when Physical RAM is full. When a Linux machine runout the RAM it use swap space to... Read more

  Posted on 09 June 2021

• Modifying File Contexts in SELinux

  We now know how to set SELinux contexts, both directly through tools such as chcon as well as through the restorecon application, which queries the SELinux... Read more

  Posted on 08 June 2021

• SELinux File Context Expressions

  When we think that the context of a file is wrong, we need to correct the context. SELinux offers several methods to do so, and some distributions even add in... Read more

  Posted on 07 June 2021

• Keeping Or Ignoring SELinux Contexts

  Now that we are aware that file contexts are stored as extended attributes, how do we ensure that files receive the correct label when they are written or... Read more

  Posted on 06 June 2021

• How to Install Nginx on Ubuntu 21.04 Server

  

  Nginx is the most potent, open-source, and a high-performance Web server. It can work as a reverse proxy server also, nowadays, is used by most of the most... Read more

  Posted on 05 June 2021

• Introduction to SELinux File Contexts

  SELinux file contexts are the most important configuration that a system administrator will have to work with when working with SELinux on the system. Read more

  Posted on 05 June 2021

• 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

  

  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

  

  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 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

  

  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