Linux, Windows, Security, Programming, Network Tutorials
Linux provides root account as superuser or Administrator. As root account has all privileges to manage a system this may be a threat for misuse or error of administrators. We generally use normal user accounts in daily operation and change to the superuser with su command. Root root exist all Linux systems and can not be deleted because … Read more
Linux users can be added with different ways. but one of the most used way is adding them throughout the shell because Linux admins loves shell usage. In this tutorial we will look how to add user into a Ubuntu, Kali, Mint, Debian box and provide or change required parameters. We will also look user … Read more
passwd command is used to change passwords and provides information about Linux accounts. Normal or root user can change passwords. Normal users can only change their own password on the other hand root can change all user’s passwords. Passwords related information is stored in /etc/passwd file. The only password which is stored as the hash is stored in … Read more
Linux operating system have users to operate applications, services and other stuff. Multiple users can be interact with Linux and we call it multi-user. It may be ridiculous but long time ago operating systems was single user. Which means to work on a system other users should sign out. Now in our era we have … Read more
Linux provides usermod command by default for the most of the distributions. This command is used to user modification. After user creation the user related information, values and policies can be changed with usermod command. In this tutorial we will look various features of usermod command with examples. Syntax Syntax of the usermod command is like … Read more
Linux servers used around the world dominantly on the internet. They are used as a web server, file server, application server, etc. Being on the internet creates som risk for these systems. There are different risks on the internet. One of them is automated attackers who use scripts and tool in an automated fashion. Linux … Read more
The problem is we want to change the already created user name or user id. As we know there is a lot of configuration those rely on the user id like permissions. We will use usermod command to make this change. Keep in mind this changes will effects system wide. List User Info Before starting … Read more
Linux passwords are used to authenticate users. Linux passwords was hold in /etc/passwd file with other user related information like default shell, home directory path etc. Now in modern Linux distributions holds passwords in /etc/shadow file which have restricted access. This file holds user passwords as hash values with salt. Hashing and salting makes passwords … Read more
In Linux users may have different groups registered. By default adding a user to the Linux system will create new user. There are different commands to change user group one of them is useradd which actually create new user and sets given group to the newly created user. As always we need root privileges to … Read more
How can I remove a Linux user account from Linux system. As you know user management in Linux requires root privileges. While removing user his home directory can be remove or preserved. As same with mail box. User mailbox can be preserved. List Existing Accounts Before removing or deleting an user account checking the existing of … Read more