How To Install unbound on Ubuntu 20.04
Introduction
In this tutorial we learn how to install unbound on Ubuntu 20.04.
What is unbound
unbound is:
Unbound is a recursive-only caching DNS server which can perform DNSSEC validation of results. It implements only a minimal amount of authoritative service to prevent leakage to the root nameservers: forward lookups for localhost, reverse for 127.0.0.1 and ::1, and NXDOMAIN for zones served by AS112. Stub and forward zones are supported.
This package contains the unbound daemon.
Package: unbound Architecture: amd64 Version: 1.9.4-2ubuntu1 Priority: optional Section: universe/net Origin: Ubuntu Maintainer: Ubuntu Developers [email protected] Original-Maintainer: unbound packagers [email protected] Bugs: https://bugs.launchpad.net/ubuntu/+filebug Installed-Size: 4152 Depends: adduser, dns-root-data, lsb-base (>= 3.0-6), openssl, unbound-anchor, libc6 (>= 2.27), libevent-2.1-7 (>= 2.1.8-stable), libfstrm0 (>= 0.2.0), libprotobuf-c1 (>= 1.0.1), libpython3.8 (>= 3.8.0~a1), libssl1.1 (>= 1.1.1), libsystemd0 Suggests: apparmor Enhances: munin-node Filename: pool/universe/u/unbound/unbound_1.9.4-2ubuntu1_amd64.deb Size: 682900 MD5sum: 1f0b6867bdd1772f44ee7d623b7c0c80 SHA1: 2c9ea37c95fa1e04bcced2212b9d798824a02ef6 SHA256: dc80aaa841388fbcb433a384658293e40eebbfde34d308414dbdfe258bf6fde6 Homepage: https://www.unbound.net/ Description-en: validating, recursive, caching DNS resolver Unbound is a recursive-only caching DNS server which can perform DNSSEC validation of results. It implements only a minimal amount of authoritative service to prevent leakage to the root nameservers: forward lookups for localhost, reverse for 127.0.0.1 and ::1, and NXDOMAIN for zones served by AS112. Stub and forward zones are supported.
This package contains the unbound daemon.
There are three methods to install unbound on Ubuntu 20.04. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install unbound Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install unbound using apt-get by running the following command:
sudo apt-get -y install unbound
Install unbound Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install unbound using apt by running the following command:
sudo apt -y install unbound
Install unbound 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 Ubuntu. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install unbound using aptitude by running the following command:
sudo aptitude -y install unbound
How To Uninstall unbound on Ubuntu 20.04
To uninstall only the unbound package we can use the following command:
sudo apt-get remove unbound
Uninstall unbound And Its Dependencies
To uninstall unbound and its dependencies that are no longer needed by Ubuntu 20.04, we can use the command below:
sudo apt-get -y autoremove unbound
Remove unbound Configurations and Data
To remove unbound configuration and data from Ubuntu 20.04 we can use the following command:
sudo apt-get -y purge unbound
Remove unbound configuration, data, and all of its dependencies
We can use the following command to remove unbound configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge unbound
References
Summary
In this tutorial we learn how to install unbound package on Ubuntu 20.04 using different package management tools: apt, apt-get and aptitude.
