How to generate strong passwords using Ubuntu-provided applications

There are many security mechanisms in the http://www.aliyun.com/zixun/aggregation/13835.html ">ubuntu" that require passwords in many places. Passwords are the most commonly used security policy in your computer, and are often used to protect sensitive information, such as your e-mail account, or your Ubuntu user account. It is extremely important to select a strong password for an application or service that requires a password. If the password you choose comes from a common message such as a word in a dictionary, an attacker can quickly get your password by using a method called "brute force cracking", which in turn threatens the account or data protected by the password.

This wizard demonstrates how to generate a strong password using an application provided by Ubuntu. This wizard does not discuss some of the general password policies, including periodic replacements, no reuse, and so on. These policies are beyond the scope of this wizard, and for general password policies and more information about passwords, readers can refer to the resources provided at the end of this wizard.

This wizard applies to all readers who have sufficient experience with the GNU command line (including installing packages with apt, executing command-line tools) and are interested in passwords and generating strong passwords with command-line tools.

Fervent passwords strong password

Applications and libraries in the Ubuntu system can help you build or enhance strong passwords. Strong passwords are defined as passwords that meet the following criteria:

At least eight (8) characters in length
Does not contain your username, real name, or organization name
Does not contain the complete dictionary word
Obviously different from your previous password.
Contains three (3) of the following character types
Lowercase letters (A,B,C, etc.)
Capital letters (A,B,C, etc.)
Numbers (0,1,2, etc.)
Special characters (@,%,!, etc.)

Generating fervent passwords in Ubuntu generates strong passwords in Ubuntu

Now we know the composition of strong passwords. So how do we get the computer to automatically help us generate strong passwords? This section will focus on the "Automatic Password Generator" (Automatic Password Generator, APG) program provided in the Ubuntu System Management (Unierse) group. APG, as described in its name, is responsible for automatically generating passwords. And APG not only generates passwords, but generates strong passwords for you. If you want to further study APG, you can find all the information on APG's website.

It should be explained here that the password feature of the user account in Ubuntu provides some ways to enhance the user's password, but in some cases the application cannot be protected by this password. This wizard is designed to help users generate a more powerful password.

Installing APG Installation APG

To install APG, first make sure you have an available Internet connection, activate the universe package in the software library (see Universepackages), and then execute the following command at the command prompt:

You will be prompted to enter a password. The password should be your user password, or the password you entered when you executed the sudo command. Once the authorization is complete, the APG package will be downloaded and installed. You can then use or configure APG to your liking.