In this article, we will walk you through the process of completely erasing Postfix on Ubuntu 18.04. Postfix is a popular open-source Mail Transfer Agent (MTA) that routes and delivers electronic mail on a Linux system. However, there may be instances where you need to completely remove and reinstall it, such as when troubleshooting, or when you want to reset its configuration.
To completely erase Postfix on Ubuntu 18.04, you can uninstall it using the
apt command with the
purge options. After uninstalling, remove any remaining configuration files manually using the
rm command. Clean up your system by using the
autoremove command to remove any remaining dependencies and packages. If you wish to reinstall Postfix, use the
apt install command. If you still have leftover configuration files after reinstalling, use the
dpkg command with the
--force-all options to forcefully remove them.
The first step in completely removing Postfix from your Ubuntu 18.04 system is to uninstall it. This can be done using the
apt command, which is the package management command-line tool in Ubuntu.
Run the following command:
sudo apt remove postfix && sudo apt purge postfix
sudo command is used to run the following command with root privileges. The
apt remove postfix command uninstalls the Postfix package but leaves behind the configuration files. The
&& operator is a bash control operator that allows you to execute multiple commands in one line. The
apt purge postfix command is used to remove the package along with its configuration files.
Removing Configuration Files
Even after running the
purge command, some manually edited configuration files may still remain on your system. These are typically located in the
/etc/postfix directory. To remove them, you can use the
sudo rm -r /etc/postfix
--recursive) option is used with
rm to remove directories and their contents recursively.
After removing Postfix and its configuration files, you can clean up your system by removing any remaining dependencies and packages that are no longer needed. This can be done using the
sudo apt autoremove
If you wish to reinstall Postfix, you can do so by using the
apt install command:
sudo apt install postfix
During the reinstallation, you should be prompted with the initial configuration questions.
Forcefully Removing Remaining Configuration Files
If you still have the previous configuration after reinstalling Postfix, it is possible that the configuration files were not completely removed. In that case, you can use the
dpkg command to forcefully remove any remaining configuration files:
sudo dpkg --purge --force-all postfix
--purge option removes the package and its configuration files. The
--force-all option forces all operations.
By following the above steps, you should be able to completely erase Postfix from your Ubuntu 18.04 system. Remember to always backup your configuration files before making any changes or removing packages. Running commands with
sudo ensures proper permissions.
Please note that these steps should be performed by users who are familiar with Linux systems and understand the implications of removing packages and configuration files. If you’re unsure, consider seeking help from a knowledgeable colleague or a trusted online community.
No, you need to use the
apt purge command to remove Postfix along with its configuration files.
Removing Postfix will only affect the Postfix MTA itself. Other mail-related services, such as Dovecot or Sendmail, will not be affected.
You can use the
dpkg -l | grep postfix command to check if any Postfix packages are still installed. If no output is displayed, it means Postfix has been completely removed.
Reinstalling Postfix is optional and depends on your specific needs. If you want to continue using Postfix as your MTA, you can reinstall it using the
apt install postfix command.
If you encounter any issues, it is recommended to seek help from a knowledgeable colleague or consult a trusted online community for assistance.