Linux, Windows, Security, Programming, Network Tutorials
AAA or Authentication, Authorization and Accounting is a term used to describe 3 functions in IT. Mainly AAA is used to control access to different IT resources like network, service, server, etc. AAA simply consists of 3 steps where each completes others for perfect security. What Is Authentication? Authentication is the process of identifying a … Read more
There are some good reasons to change or reset a Windows operating system password. Windows passwords can be changed in different ways for different Windows versions like Windows XP, Windows 10, etc. In this tutorial, we will learn how to change or reset Windows password from User Account Control, PC Settings, Computer Management, Command Line … Read more
User is an entity that has the right to use some resources, applications, equipment, process, or system. Operating systems and applications generally have users to authorize and authenticate their actions. Also, users are used to storing data personally in a private area like Home or Users. Linux Users Linux is an operating system and it … Read more
Windows Active Directory provides very useful enterprise user management capabilities. Powershell is a new scripting language provides for Microsoft Operating systems. Get-ADUser is a very useful command or commandlet which can be used to list Active Directory users in different ways. List Domain Users Interactively We will start with a simple example. We will list … Read more
CentOS is enterprise level Linux distribution which is clone of the RedHat. User management like create, add, remove etc is important part of the daily Administration tasks. In this tutorial we will look how to add new user to the CentOS system. List Current Users Before creating new user we will list existing users. We … Read more
Linux provides different mechanisms for practical and security reasons. chroot is one of them. Processes in linux can access to the file system or root by default. Linux kernel also provides chroot mechanism to restrict access to the whole filesystem in Linux. Syntax The chroot syntax is like below. chroot OPTION NEWROOT COMMAND OPTION is chroot option NEWROOT is … Read more
Linux shadow password suite provides password related utils and configuration. /etc/login.defs or simple login.defs provides configuration about shadow utils. This file provides password, mail, user id, group id, user home related configuration. We will look all of the useful configurations in this tutorial. Login.defs Configuration File login.defs configuration file is located at /etc/login.defs . It is simple text file. … Read more
Security role is the part where an individual plays in a complete organization security implementation and administration. In this tutorials different security roles and responsibilities in an organization. Senior Manager Senior Manager is responsible for all organization security. Senior Manager will have following roles and responsibilities Sign off all policy issues Endorse security policy Sole … Read more
Linux kernel provides some configuration about system-related limits and maximums. These are like maximum file handler count, maximum file locks, maximum process count, etc. These limits are used to stay in a safe area and do not bottleneck system performance. But sometimes these limits should be decreased or increased. ulimit is used to change these limits … Read more
Linux provides different tools to identify current and related users. whoami is one of the command that is used to display information about the current user. Print Current User We can print current user with whoami command like below. Use who am i Another usage option of the whoami command is using it separately. So we can simply … Read more