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If your computer contains important personal information, it is a good habit to change your account password often to prevent unauthorized access to the computer.
Another way to get to the System Settings section is through the Quick list on the left side of the screen.
Use a combination of numbers, upper-case and lower-case characters, spaces and special characters in your password. Do not include any personal information in the password such as your phone numbers, your name, or date of birth as these are easy for outsiders to guess.
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Question: How do I change password for my account and other user accounts on Ubuntu Linux OS?
Answer: On Ubuntu, you can change password from either GUI or command line as explained below. Enter New Password: Once you enter the current password, the new password text field will be enabled. After you get back to the recovery menu, select resume normal boot, and use Ubuntu as you normally would—only this time, you actually know the password! I had put my password into a dodgy dialogue in Ubuntu, so to be safe changed it using the command line. When I go to recovery mode and drop out to root she’ll prompt it prompts me for a root password.
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Users are further divided into groups for the purposes of easier administration and those groups can have different levels of privileges. In this chapter we will cover the steps to add, remove and manage users and groups on an Ubuntu 11.04 system. There are two methods for adding new users to a system, one way is using the graphical User Settings tool and the other is to use the adduser command-line tool.
To add a new user to your Ubuntu system using the User Settings tool select the power button in the top right hand corner of the screen and choose System Settings from the resulting menu to launch the Control Center.

The tool may also be launched by pressing Alt-F2 and entering users-admin into the Run a command text box. Either enter a secure password (a minimum of 5 characters is required), or opt for the system to generate a random one on the new user’s behalf. The above command will prompt for a password for the account and optional contact information. An existing user may be deleted using the same User settings dialog used to add a user as outlined above.
Note that the deletion process will remove the account but leave the user's home directory intact. To administer the group settings click on the Manage Groups button in the main window of the User Settings tool. To add a new group click on the Add button and enter the name of the group you wish to add. To modify an Ubuntu user group, select the group to modify from the list of groups in the Group settings dialog (as outlined above) and click on Properties. Note that if the group to be deleted is the primary group for any user it cannot be deleted. Log in to the system, click the gear icon at the top right of the screen, and choose System Settings from the expanded menu.
In the System Settings window under the System section, choose the User Accounts option to continue. If there are multiple user accounts, choose the one for which you want to change the password in the accounts box. The comments and forum posts are property of their posters, all the rest ® 2003-2015 by QD Ideas, LLC. I will be posting instruction guides, how-to, troubleshooting tips and tricks on Linux, database, hardware, security and web. This means that more than one user can be actively logged and using the system at any one time.
As with all users, the option is also available to allow the user to log in into the system without entering a password.

In particular you will want to ensure the user does not have Administration privilege unless the user is a trusted system administrator. Select the System desktop menu and choose Users and Groups from the Administration sub-menu to launch the User settings dialog.
This will need to be deleted manually if it, and any files therein, are no longer required. Add the users that should belong to this group by checking the box next to each user name in the list. The resulting Group properties dialog (shown below) allows basic settings such as the group ID, group name and group members to be changed.
With the user account highlighted, you will see a brief description of the account on the right side of the window. Obviously, it makes sense for each user to have their own user account and home directory, and for different users to have different privileges.
In such an environment you may wish to create an accounts group and assign all the Accounting department personnel to that group. To disable administration privileges, ensure that the Administer the system option is deselected (the default setting). For example all sales people might belong to a sales group, whilst accounting staff might belong to the accounts group and so on. However, it is not recommended to use this password because it is quite difficult to remember. After you select recovery mode and wait for all the boot-up processes to finish, you’ll be presented with a few options. New groups are added either using the User Settings graphical tool, or by using the addgroup command-line tool.
Question: how do i change password for my account and other user accounts on ubuntu linux os?

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