How To Install tlslookup on Debian 12
Introduction
In this tutorial we learn how to install tlslookup on Debian 12.
What is tlslookup
tlslookup is:
nss-tls is an alternative, encrypted name resolving library to use with glibc, which uses DNS-over-HTTPS (DoH).
The glibc name resolver can be configured through nsswitch.conf(5) to use nss-tls instead of the DNS resolver, or fall back to DNS when nss-tls fails.
This way, all applications that use the standard resolver API (getaddrinfo(), gethostbyname(), etc’), are transparently migrated from DNS to encrypted means of name resolving, with zero application-side changes and minimal resource consumption footprint. However, nss-tls does not deal with applications that use their own, built-in DNS resolver.
This package contains the utility program to lookup DNS names using libnss-tls.
There are three methods to install tlslookup on Debian 12. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install tlslookup Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install tlslookup using apt-get by running the following command:
sudo apt-get -y install tlslookup
Install tlslookup Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install tlslookup using apt by running the following command:
sudo apt -y install tlslookup
Install tlslookup 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. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install tlslookup using aptitude by running the following command:
sudo aptitude -y install tlslookup
How To Uninstall tlslookup on Debian 12
To uninstall only the tlslookup package we can use the following command:
sudo apt-get remove tlslookup
Uninstall tlslookup And Its Dependencies
To uninstall tlslookup and its dependencies that are no longer needed by Debian 12, we can use the command below:
sudo apt-get -y autoremove tlslookup
Remove tlslookup Configurations and Data
To remove tlslookup configuration and data from Debian 12 we can use the following command:
sudo apt-get -y purge tlslookup
Remove tlslookup configuration, data, and all of its dependencies
We can use the following command to remove tlslookup configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge tlslookup
Dependencies
tlslookup have the following dependencies:
References
Summary
In this tutorial we learn how to install tlslookup package on Debian 12 using different package management tools: apt, apt-get and aptitude.
