User management on Fedora 15 is just as easy as on any other distribution or operating system. And the graphical user management tools (there are two) are very intuitive to use. There are two types of user accounts on Fedora 15 – Standard and Administrator. The Administrator has root or super user privileges. During installation, the user created may be added to the Administrators group.

One concern when users FTP into your server, is that by default users who have accounts can roam your server to view contents of files. VSFTPD by default does not allow user logins, it allows anonymous by default. Anonymous users by default are locked into the directory that they login to. This is exactly what you would want.

The two types of user accounts are Administrator and Standard. The user account created during the installation process is, by default, of the Administrator type. That is the superuser. A user with that account can perform any task on the system.

Fedora is one of very few distributions that does not have the auto-login feature in its graphical user management tool. Auto-login allows the system to automatically login a user without requesting authentication, that is, it enables password-less logins. While it is a very convenient feature, it is a security risk. Why?

When you need to set up a user account to give a user shell access to the system, the only logical choice of login tool is OpenSSH.

By default, the root account password is locked in Ubuntu - Canonical neither supports nor advocates enabling the root account. This means that you cannot login as root directly or use the su command to become the root user. However, since the root account physically exists it is still possible to run programs with root-level privileges.

This tutorial will explain how to Add,Modify and Delete Users,Groups in Ubuntu.Linux users can login to the system and use with the provided previliges. Linux groups are a mechanism to manage a collection of computer system users. All Linux users have a user ID and a group ID and a unique numerical identification number called a userid (UID) and a groupid (GID) respectively.

Here you can see the default login screen for Ubuntu 8.10. You simply add username and password and you have access to the Desktop. Simple, however, as you will see there are many options that can go with this login process. If you will go to System/Administration and select Login Window you will find that you have a lot of options available for login.

When you need to expire a Linux user account or delete a user there are some factors you need to take into account. Linux administrators should follow guidelines to protect the system integrity and not allow users to access their accounts after leaving the company.