Check currently login user on your Linux system.

   How to check who is currently login on your Linux system now?  To show who is login or if you want to check currently login user... or if you want to check who using your Linux system, just execute who command as show on the example below.

Linux who check currently login user:

Open shell terminal and type in who command and then hit Enter key…

List all group on Linux Fedora.

   How to list all group on Linux system?  The command example below show how to list all group on Linux Fedora system.  The list of group name came from the group configuration file is store in /etc/group and you can also use cat command to display the contents of group file. Please note that you may need root user privilege to view the contents of group file.

List all group in Linux example:

1.  Open the shell terminal, type in su - command to become root user.

Linux list all user.

   The command example below show how to list all user that have been created inside your Linux system.  The example on Linux list all user below show the list all existing user with their user name, user id and user full name.  You can modify or customize the command example below to display all user inside your Linux system and include other information base on the information inside the /etc/passwd configuration file that you think appropriate.  Please note that the example below execute on Linux Fedora system, the system reserve uid up to 499 for software and system use and the new user uid start from 500 and above.

Linux Change root Password.

   The step by step article on Linux change root password below show the step that you need to take to change root password.  Please note that only root user can change root password, so you need to login as root or use su command and then change root password.  If you lost your root password this article on how to reset root password may help you to reset root user password. 

Check Linux User Information using Linux finger Command.

   The example below use finger command to check Linux user information.  The finger command can be use to get user information including user login name, user full name, user home directory,  user shell, user terminal name (user tty), user idle time, user came from.., user login time, user office location and user phone number.

Check user information example:

View Linux passwd command Manual.

   The example below show how to use man command to view Linux passwd command manual on Linux Fedora operating system.  To display Linux passwd command manual just type in man command and the command name that you want to display the manual page... in this example we want to view Linux passwd command manual... so after the man command we type in passwd (the Linux command name that we want to view the manual).

Linux passwd command manual example:

Linux Create User With Full Name.

   If you like to adding user along with his or her full name, execute adduser command with -c option.  The example below show the adduser command example need to execute in order to create user with full name on Linux system.

User with full name

1.  login to the system and execute su command to gain root user privileges.

Linux Create User Account Step by Step Example.

   The Linux create user account step by step example below use useradd command to demonstrate how to create user account on Linux operating system.  The useradd command only can be execute by root user and user that have sufficient privilege to create user on Linux system.  The step by step below begin with the su command to make sure that we have the privileges to create user on the Linux system.

Linux create user example:

BAD PASSWORD: it is based on a dictionary word.

   The example below show that the BAD PASSWORD: it is based on a dictionary word message appear when we try to change current Linux password on Linux Fedora system.  The message appear when we try to use the dictionary base word as password.

BAD PASSWORD based on dictionary word

BAD PASSWORD: it is too simplistic/systematic.

   Have you ever get BAD PASSWORD: it is too simplistic/systematic message when you try to change password on your Linux system using passwd command.  The command example below show the example of BAD PASSWORD: it is too simplistic/systematic message and the step need to be taken to make sure that the message did not appear again.  

BAD PASSWORD