Awesome Sysadmin

A curated list of amazingly awesome Free and Open-Source sysadmin resources. Please read the Pull Request template if you wish to add software and consider donating to the FLOSS projects you use regularly. Please consider contributing to fix one of the pinned issues if your time allows.

Software
List of Licenses
External links
Communities / Forums
Repositories
Websites
License

Software

Automation

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Build automation.

Apache Ant - Automation build tool, similar to make, a library and command-line tool whose mission is to drive processes described in build files as targets and extension points dependent upon each other. (Source Code) Apache-2.0 Java
Apache Maven - Build automation tool mainly for Java. A software project management and comprehension tool. Based on the concept of a project object model (POM), Maven can manage a project's build, reporting and documentation from a central piece of information. (Source Code) Apache-2.0 Java
Bazel - A fast, scalable, multi-language and extensible build system. Used by Google. (Source Code) Apache-2.0 Java
Bolt - You can use Bolt to run one-off tasks, scripts to automate the provisioning and management of some nodes, you can use Bolt to move a step beyond scripts, and make them shareable. (Source Code) Apache-2.0 Ruby
GNU Make - The most popular automation build tool for many purposes, make is a tool which controls the generation of executables and other non-source files of a program from the program's source files. (Source Code) GPL-3.0 C
Gradle - Another build automation system. (Source Code) Apache-2.0 Groovy/Java
Rake - Build automation tool similar to Make, written in and extensible in Ruby. (Source Code) MIT Ruby

Backups

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Backup software.

Amanda - Backup and archive many computers on a network to disk, tape changer/drive or cloud storage. (Source Code) MIT C
Backupninja - Lightweight, extensible meta-backup system, provides a centralized way to configure and coordinate many different backup utilities. GPL-2.0 Shell
BackupPC - High-performance, enterprise-grade system for backing up to a server's disk.. (Source Code) GPL-3.0 Perl
Bareos - Cross-network backup solution which preserves, archives, and recovers data from all major operating systems. (Source Code) AGPL-3.0 C++/C
Barman - Backup and Recovery Manager for PostgreSQL. (Source Code) GPL-3.0 Python
BorgBackup - Deduplicating archiver with compression and authenticated encryption. (Source Code) BSD-3-Clause Python
Burp - Network backup and restore program. (Source Code) AGPL-3.0 C
Dar - Which stands for Disk ARchive, is a robust and rich featured archiving and backup software of the tar style. (Source Code) GPL-2.0 C++
Duplicati - Backup client that securely stores encrypted, incremental, compressed backups on cloud storage services and remote file servers. (Source Code) LGPL-2.1 C#
Duplicity - Encrypted bandwidth-efficient backup using the rsync algorithm. (Source Code) GPL-2.0 Python
Proxmox Backup Server - Proxmox Backup Server is an enterprise-class, client-server backup solution thatis capable of backing up virtual machines, containers, and physical hosts. (Source Code) GPL-3.0 Rust
rclone - Command-line program to sync files and directories to and from different cloud storage providers.. (Source Code) MIT Go
Rdiff-backup - Reverse differential backup tool, over a network or locally. (Source Code) GPL-2.0 Python
Restic - Easy, fast, verifiable, secure and efficient remote backup tool. (Source Code) BSD-2-Clause Go
Rsnapshot - Filesystem snapshot utility based on rsync. (Source Code) GPL-2.0 Perl
Shield - A pluggable architecture for backup and restore of database systems. MIT Go
UrBackup - Client/Server Open Source Network Backup for Windows, MacOS and Linux. (Source Code) AGPL-3.0 C/C++

Build and software organization tools

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Build and software organization tools.

EasyBuild - EasyBuild builds software and modulefiles for High Performance Computing (HPC) systems in an efficient way. (Source Code) GPL-2.0 Python
Environment Modules - Environment Modules provides for the dynamic modification of a user's environment via modulefiles. (Source Code) GPL-2.0 Tcl
Lmod - Lmod is a Lua based module system that easily handles the MODULEPATH Hierarchical problem. (Source Code) MIT Lua
Spack - A flexible package manager that supports multiple versions, configurations, platforms, and compilers. (Source Code) MIT/Apache-2.0 Python

ChatOps

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Conversation-driven development and management.

_See also: /r/chatops*

Eggdrop - The oldest Internet Relay Chat (IRC) bot still in active development. (Source Code) GPL-2.0 C
Errbot - Plugin based chatbot designed to be easily deployable, extensible and maintainable. (Source Code) GPL-3.0 Python
Hubot - A customizable, life embetterment robot. (Source Code) MIT Nodejs

Cloud Computing

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Cloud computing is the on-demand availability of computer system resources, especially data storage (cloud storage) and computing power, without direct active management by the user.

Please visit Cloud Native Software Landscape

Code Review

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Code review is a software quality assurance activity in which one or several people check a program mainly by viewing and reading parts of its source code.

Please visit awesome-selfhosted/Software Development - Project Management

Configuration Management

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Configuration management (CM) is a systems engineering process for establishing and maintaining consistency of a product's performance, functional, and physical attributes with its requirements, design, and operational information throughout its life.

Ansible - Provisioning, configuration management, and application-deployment tool. (Source Code) GPL-3.0 Python
CFEngine - Configuration management system for automated configuration and maintenance of large-scale computer systems. (Source Code) GPL-3.0 C
Chef - Configuration management tool using a pure-Ruby, domain-specific language (DSL) for writing system configuration "recipes". (Source Code) Apache-2.0 Ruby
Puppet - Software configuration management tool which includes its own declarative language to describe system configuration. (Source Code) Apache-2.0 Ruby/C
Rudder - Scalable and dynamic configuration management system for patching, security & compliance, based on CFEngine. (Source Code) GPL-3.0 Scala
Salt - Event-driven IT automation, remote task execution, and configuration management software. (Source Code) Apache-2.0 Python

Configuration Management Database

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Configuration management database (CMDB) software.

Related: IT Asset Management

Collins - At Tumblr, it's the infrastructure source of truth and knowledge. (Source Code) Apache-2.0 Docker/Scala
i-doit - IT Documentation and CMDB. AGPL-3.0 PHP
iTop - Complete ITIL web based service management tool. (Source Code) AGPL-3.0 PHP
netbox - IP address management (IPAM) and data center infrastructure management (DCIM) tool. (Demo, Source Code) Apache-2.0 Python

Continuous Integration & Continuous Deployment

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Continuous integration/deployment software.

Buildbot - Python-based toolkit for continuous integration. (Source Code) GPL-2.0 Python
CDS - Enterprise-Grade Continuous Delivery & DevOps Automation Open Source Platform. (Source Code) BSD-3-Clause Go
Concourse - Concourse is a CI tool that treats pipelines as first class objects and containerizes every step along the way. (Demo, Source Code) Apache-2.0 Go
drone - Drone is a Continuous Delivery platform built on Docker, written in Go. (Source Code) Apache-2.0 Go
Factor - Programmatically define and run workflows to connect configuration management, source code management, build, continuous integration, continuous deployment and communication tools. (Source Code) MIT Ruby
GitLab CI - Gitlab's built-in, full-featured CI/CD solution. (Source Code) MIT Ruby
GoCD - Continuous delivery server. (Source Code) Apache-2.0 Java/Ruby
Jenkins - Continuous Integration Server. (Source Code) MIT Java