How To Install expn on Debian 11

One-liner install command

For those in a hurry, here's a one-line installation command:

sudo apt-get update && sudo apt -y install sendmail-base

But if you are interested in the detailed steps with descriptions, the following information is for you.

What is expn and what are the ways to install it?

Before beginning this tutorial, you will need access to a server or computer running Debian 11. This guide was written specifically with a server running Debian 11 in mind, although it should also work on older, supported versions of the operating system.

Also, make sure you are running a regular, non-root user with sudo privileges configured on your server. When you have an account available, log in as your non-root user to begin.

There are several ways to install expn on Debian 11. You can use (links are clickable):

In the following sections, we will describe each method in detail. You can choose one of them or refer to the recommended one.

Install expn using apt-get

First, update apt database with apt-get using the following command.

sudo apt-get update

After updating apt-get database, You can install expn using apt by running the following command:

sudo apt -y install sendmail-base

Install expn using apt

Because expn is available in Debian 11’s default repositories, it is possible to install it from these repositories using the apt packaging system.

To begin, update apt database with apt using the following command.

sudo apt update

After updating apt database, You can install expn using apt by running the following command:

sudo apt -y install sendmail-base

Install expn using aptitude

If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Debian 11. Update apt database with aptitude using the following command.

sudo aptitude update

After updating aptitude database, You can install expn by running the following command:

sudo aptitude -y install sendmail-base

How to upgrade (update) a single package expn using apt-get?

First, you will need to update packages index. Run update command as usual:

sudo apt-get update

Next, to upgrade only the expn, e.g. single package, you should use the following format with the apt-get command/apt command:

sudo apt-get --only-upgrade install sendmail-base

Note that this command will not install any new packages! If you wish to install the package if it doesn't exist you may leave out --only-upgrade part.

sudo apt-get install sendmail-base

How To Uninstall expn from Debian 11

To uninstall only the expn package you can execute the following command:

sudo apt-get remove sendmail-base

Uninstall expn and all its dependencies

To uninstall expn and its dependencies that are no longer needed by Debian 11, you can use the command below:

sudo apt-get -y autoremove sendmail-base

Remove expn with all configurations and data

To remove expn configuration and data from your system you can run the following purge command:

sudo apt-get -y purge sendmail-base

Remove expn completely (configurations, data and all of its dependencies)

And lastly, you can run the next command to remove absolutely everything related to expn package, e.g.: configurations, data and all of its dependencies. Just use this command:

sudo apt-get -y autoremove --purge sendmail-base

Extra info and code examples

Sendmail is an alternative Mail Transport Agent (MTA) for Debian. It is suitable for handling sophisticated mail configurations, although this means that its configuration can also be complex. This package contains the base, architecture independent, portions of the sendmail packages.

Conclusion

You now have a full guide on how to install expn using apt, apt-get and aptitude tools. Also, we showed how to update as a single package and different ways to uninstall the expn from Debian 11.

See also: