How To Install syslog-ng on Debian 9
Introduction
In this tutorial we learn how to install syslog-ng on Debian 9.
What is syslog-ng
syslog-ng is:
syslog-ng is an enhanced log daemon, supporting a wide range of input and output methods: syslog, unstructured text, message queues, databases (SQL and NoSQL alike) and more.
Key features:
- receive and send RFC3164 and RFC5424 style syslog messages
- work with any kind of unstructured data
- receive and send JSON formatted messages
- classify and structure logs with builtin parsers (csv-parser(), db-parser(), etc.)
- normalize, crunch and process logs as they flow through the system
- hand on messages for further processing using message queues (like AMQP), files or databases (like PostgreSQL or MongoDB).
This package is a metapackage, depending on the rest of syslog-ng, including all available plugins. It can be safely removed, if only parts of syslog-ng need to be installed.
There are three methods to install syslog-ng on Debian 9. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install syslog-ng Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install syslog-ng using apt-get by running the following command:
sudo apt-get -y install syslog-ng
Install syslog-ng Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install syslog-ng using apt by running the following command:
sudo apt -y install syslog-ng
Install syslog-ng 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 syslog-ng using aptitude by running the following command:
sudo aptitude -y install syslog-ng
How To Uninstall syslog-ng on Debian 9
To uninstall only the syslog-ng package we can use the following command:
sudo apt-get remove syslog-ng
Uninstall syslog-ng And Its Dependencies
To uninstall syslog-ng and its dependencies that are no longer needed by Debian 9, we can use the command below:
sudo apt-get -y autoremove syslog-ng
Remove syslog-ng Configurations and Data
To remove syslog-ng configuration and data from Debian 9 we can use the following command:
sudo apt-get -y purge syslog-ng
Remove syslog-ng configuration, data, and all of its dependencies
We can use the following command to remove syslog-ng configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge syslog-ng
Dependencies
syslog-ng have the following dependencies:
References
Summary
In this tutorial we learn how to install syslog-ng package on Debian 9 using different package management tools: apt, apt-get and aptitude.