Secure Your Database: How to Set a Strong Password for Your Postgres User on Ubuntu

Table of content

  1. Introduction
  2. Importance of Securing Your Database
  3. Setting Up Postgres User on Ubuntu
  4. Generating a Strong Password
  5. Using a Password Manager
  6. Implementing Two-factor Authentication
  7. Regularly Updating Your Password
  8. Conclusion


Databases are an integral part of most modern applications, and they store important data that needs to be kept secure. One common database management system used on Ubuntu is PostgreSQL, which is known for its robust security features. However, even with a secure database system, weak passwords can compromise the overall security of the system. Therefore, it's important to set a strong password for your PostgreSQL user on Ubuntu to ensure the security of your data. In this article, we will discuss how to create a strong password for your PostgreSQL user on Ubuntu and implement security best practices to keep your database secure.

Importance of Securing Your Database

When it comes to managing applications, one of the most important considerations is data security. Databases often hold sensitive information such as personal data, financial transactions or login credentials that can be compromised if adequate security measures are not taken. Protecting your database can prevent unauthorized access, data theft, and data corruption. Here are some reasons why securing your database should be a priority:

Protects Against Data Breaches

Implementing secure passwords and access control measures plays a key role in safeguarding your database. Without proper security measures in place, hackers can easily access critical information within the database. Malicious actors can use the information to conduct identity theft, financial fraud or sell user data to third-party vendors.

Maintains Data Integrity

Even if no theft occurs, improper access or inadequate security can cause changes to the database that may result in data loss, errors, or inconsistent data. Secure databases ensure the integrity of the vital information stored inside.

Complies with Industry Regulations

Certain industries such as healthcare and banking have compliance regulations that they need to abide by to remain in business. Failing to adhere to these regulations can result in hefty fines and even legal consequences. Having secure database access with complex passwords helps protect sensitive data, ensuring that the regulations are met, and the company stays in compliance.

Overall, securing your database is an essential step towards protecting your application's data. Using strong passwords is one of the easiest yet most effective ways to prevent data breaches and unauthorized access. By taking appropriate measures, you can prevent sensitive data from falling into the wrong hands and increase the overall security of your application.

Setting Up Postgres User on Ubuntu

Before setting up a strong password for your Postgres user on Ubuntu, you need to create the user first. Here's how to do it:

  1. Install PostgreSQL: You can install PostgreSQL on Ubuntu by running this command in your terminal: sudo apt-get install postgresql postgresql-contrib. This will install both PostgreSQL and some additional components.

  2. Switch to the Postgres user: Once the installation is complete, switch to the Postgres user by running sudo su postgres. Now you are ready to create your Postgres user.

  3. Create the Postgres user: To create a new user, run the command createuser --interactive. This will prompt you to enter a name for the new user and specify whether they should be able to create new databases. If you only need the user to access an existing database, you can skip this step.

  4. Set a password for the new user: After creating the user, set a password for them by running the command psql -c "ALTER USER username WITH PASSWORD 'new_password'";. Replace "username" with the name you chose for your user and "new_password" with a strong password of your own choosing.

Now that you have set up your Postgres user and given them a strong password, you can move on to securing your database even further.

Generating a Strong Password

is a crucial step in securing your database against unauthorized access. A strong password should be complex and difficult to guess, making it more resistant to brute force attacks. There are several best practices to follow when :

  1. Use a combination of uppercase and lowercase letters, numbers, and special characters such as !, @, #, $, %, &.

  2. Avoid using common words, phrases, or sequences like "password," "123456," or "qwerty."

  3. Ensure that the password is at least 12 characters in length, but longer is better.

  4. Use a password manager to generate and store your passwords securely.

  5. Consider using a passphrase, which is a sequence of random words strung together, as an alternative to a complex password.

Here is an example of a strong password generated using these guidelines: T5!aBd#mPf*z. This password uses a combination of uppercase and lowercase letters, numbers, and special characters and is 14 characters long.

Remember, is only the first step in securing your database. Be sure to follow other best practices such as limiting user access and monitoring database activity to ensure that your data remains safe and secure.

Using a Password Manager

If you're dealing with multiple databases and logins, it can be difficult to keep track of all the different passwords necessary to secure your databases. This is where a password manager comes in handy. A password manager is an application that allows you to store your passwords and login information in a secure, encrypted database.

There are a variety of password managers available, but one popular option for Ubuntu users is KeePassX. This is a free and open-source password manager that supports advanced features such as multiple user accounts and strong encryption.

Once you've installed and set up your password manager, you can use it to create a strong, unique password for your Postgres user on Ubuntu. By , you can ensure that your password is not easily guessable and that it is not reused for other accounts.

To use a password manager effectively, it's important to follow best practices such as:

  • Creating strong, unique passwords for each account
  • Changing passwords regularly
  • Ensuring that your password manager is up-to-date and secure

By following these best practices and to store your Postgres user password, you can help ensure that your database is secured against unauthorized access.

Implementing Two-factor Authentication

Two-factor authentication (2FA) is an extra layer of security to protect your Postgres user account, and it adds an additional authentication step before accessing the database. It requires you to provide two pieces of evidence to verify your identity: something you know (your password) and something you have (a security token or authentication app).

Implementing 2FA adds additional security against unauthorized access to your database, as even if a hacker does get hold of your password, they will need access to your authentication token as well. Here are some steps to implement 2FA for your Postgres user:

  1. Install the Two-factor authentication (2FA) module package using the following command:
sudo apt-get install libpam-google-authenticator
  1. Run google-authenticator command to begin the setup process:
  1. Follow the prompt to set up the 2FA module:
  • Enter yto configure the module.
  • Scan the QR code displayed on your screen using your preferred two-factor authentication app.
  • Verify your token by entering it in the prompt.
  • Set the rate-limiting policy by entering y.
  1. The google-authenticator command creates a .google_authenticator configuration file within your home directory. Open the file for editing, and do the following:
  • Set disallow reuse your previous codes to no.
  • Set the window size to the number of tokens you want to accept.
  • Set the rate-limiting policy to a preferred value.
  1. Log in to Postgres:
psql postgres
  1. Edit the pg_hba.conf file:

sudo vi /etc/postgresql/10/main/pg_hba.conf

  1. Add the following line to the file:
host    all     postgres     pam nullok
  1. Restart Postgres server:
sudo service postgresql restart
  1. Test your configuration by attempting to log in, which will prompt you for your authentication code.

By implementing 2FA for your Postgres user, you'll add an additional layer of protection to your database, and make it harder for attackers to obtain valuable data.

Regularly Updating Your Password


To maintain the security of your Postgres database, it is important to regularly update your password. Even a strong password can become compromised over time, so changing it periodically adds an extra layer of protection against potential threats.

Here are some tips for updating your password:

  1. Set a Schedule: It's important to determine a schedule for updating your password that works for you, such as every 90 days or every 6 months.

  2. Use a Strong Password: When creating a new password, make sure it is strong and difficult to guess. Use a combination of upper and lowercase letters, numbers, and special characters.

  3. Avoid Reusing Passwords: Resist the urge to use the same password for multiple accounts. This can potentially compromise all of your accounts if one password is breached.

  4. Keep Your Password Private: Never share your password with anyone else, and be aware of phishing scams that attempt to steal your login credentials.

  5. Update Your Application: Any applications that use your Postgres database should also be updated with the new password to ensure continued functionality.

By and following these best practices, you can help ensure the security of your Postgres database and protect your valuable data.


In , setting a strong password for your Postgres user on Ubuntu is an essential step to securing your database. By following the steps outlined in this guide, you can ensure that your password is both complex and unique, making it difficult for hackers to gain unauthorized access to your system. Remember to avoid using common words or phrases and to use a combination of upper and lower-case letters, numbers, and special characters. Also, consider changing your password on a regular basis to maintain a high level of security. With these measures in place, you can be confident that your database is protected from potential threats.

Cloud Computing and DevOps Engineering have always been my driving passions, energizing me with enthusiasm and a desire to stay at the forefront of technological innovation. I take great pleasure in innovating and devising workarounds for complex problems. Drawing on over 8 years of professional experience in the IT industry, with a focus on Cloud Computing and DevOps Engineering, I have a track record of success in designing and implementing complex infrastructure projects from diverse perspectives, and devising strategies that have significantly increased revenue. I am currently seeking a challenging position where I can leverage my competencies in a professional manner that maximizes productivity and exceeds expectations.
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