Ansible is an open-source automation tool that allows you to automate configuration management and application deployment. It uses simple, human-readable scripts, making it easy to use.
Puppet
Puppet is a configuration management tool that helps automate the provisioning and management of servers. It uses a declarative language for defining system configurations.
SaltStack
SaltStack is a powerful automation and configuration management tool that uses a master-minion architecture to manage and control servers.
Docker
While Docker is primarily a containerization platform, it is also useful for server management. Docker containers can simplify the deployment and scaling of applications.
Nagios
Nagios is a popular open-source monitoring system that helps you keep an eye on the health and performance of your servers and network devices.
Zabbix
Zabbix is another open-source monitoring solution that offers advanced features for server and network monitoring, as well as alerting and visualization.
Read A Detailed Guide on Best Server Management Practices