**A curated list of amazingly awesome open source sysadmin resources.** Please read [CONTRIBUTING](./CONTRIBUTING.md) if you wish to add software and consider [donating](https://github.com/n1trux/awesome-donations) to the FLOSS projects you use regularly.
* [EasyBuild](https://easybuild.readthedocs.org/en/latest/) - EasyBuild builds software and modulefiles for High Performance Computing (HPC) systems in an efficient way.
* [environment-modules Lmod](https://www.tacc.utexas.edu/research-development/tacc-projects/lmod) - Lmod is a Lua based module system that easily handles the MODULEPATH Hierarchical problem.
* [HPCBIOS](hpcbios.readthedocs.org/en/latest/) - HPCBIOS is an effort to setup a common, well-documented and reproducible, environment spanning across multiple HPC systems & sites, *inclusive* of documentation.
* [CloudBot](https://github.com/CloudBotIRC/CloudBot) - The simple, fast, expandable Python IRC bot.
* [Eggdrop](http://www.eggheads.org/) - the world's most popular IRC bot, designed for flexibility and ease of use, and is freely distributable under the GNU GPL.
* [WAPT](https://dev.tranquil.it/wiki/WAPT_-_apt-get_pour_Windows/en) - Network-wide (un)installation, configuration and upgrades of Windows based software.
* [BOSH](http://bosh.io/docs/) - IaaS orchestration platform originally written for deploying and managing Cloud Foundry PaaS, but also useful for general purpose distributed systems.
* [Cloudify](http://getcloudify.org/) - TOSCA-based cloud orchestration software platform written in Python and YAML.
* [Overcast](http://andrewchilds.github.io/overcast/) - Deploy VMs across different cloud providers, and run commands and scripts across any or all of them in parallel via SSH.
* [git-annex assistant](http://git-annex.branchable.com/assistant/) - A synchronised folder on each of your OSX and Linux computers, Android devices, removable drives, NAS appliances, and cloud services.
* [ownCloud](https://owncloud.org) - Provides universal access to your files via the web, your computer or your mobile devices.
* [Pydio](https://pyd.io) - Pydio (formerly AjaXplorer) is a mature solution for file sharing and synchronization.
* [Gerrit](https://www.gerritcodereview.com/) - Based on the Git version control, it facilitates software developers to review modifications to the source code and approve or reject those changes.
* [Phabricator](http://phabricator.org/) - Code review tool build by facebook and used by WikiMedia, FB, dropbox etc. Comes with an integrated wiki, bug tracker, VC integration and a CLI tool called arcanist.
* [Review Board](https://www.reviewboard.org/) - Available as free software under the MIT License.
* [Horde Groupware](http://www.horde.org/apps/groupware) - PHP based collaborative software suite that includes email, calendars, wikis, time tracking and file management.
* [i-doit](http://www.i-doit.org/) - IT Documentation and CMDB.
* [iTop](http://www.combodo.com/-Overview-.html) - Complete ITIL web based service management tool.
* [Ralph](https://github.com/allegro/ralph) - Asset management, DCIM and CMDB system for large Data Centers as well as smaller LAN networks.
* [Clusto](https://github.com/clusto/clusto) - Helps you keep track of your inventory, where it is, how it's connected, and provides an abstracted interface for interacting with the elements of the infrastructure.
* [Capistrano](http://capistranorb.com/) - Deploy your application to any number of machines simultaneously, in sequence or as a rolling set via SSH (rake based).
* [Fabric](http://www.fabfile.org/) - Python library and cli tool for streamlining the use of SSH for application deployment or systems administration tasks.
* [Mina](http://nadarei.co/mina/) - Really fast deployer and server automation tool (rake based).
* [Rocketeer](http://rocketeer.autopergamene.eu/) - PHP task runner and deployment tool.
* [OpenAFS](http://www.openafs.org/) - Distributed network file system with read-only replicas and multi-OS support.
* [TahoeLAFS](https://tahoe-lafs.org/trac/tahoe-lafs) - secure, decentralized, fault-tolerant, peer-to-peer distributed data store and distributed file system.
* [XtreemFS](http://www.xtreemfs.org/) - XtreemFS is a fault-tolerant distributed file system for all storage needs.
* [RackTables](http://racktables.org/) - Datacenter and server room asset management like document hardware assets, network addresses, space in racks, networks configuration.
* [Ralph](https://github.com/allegro/ralph) - Asset management, DCIM and CMDB system for large Data Centers as well as smaller LAN networks.
* [Adagios](http://adagios.org/) - Web based Nagios interface for configuration and monitoring (replacement to the standard interface), and a REST interface, [SourceCode](https://github.com/opinkerfi/adagios), [Documentation](https://github.com/opinkerfi/adagios/wiki))
* [Alerta](https://github.com/guardian/alerta) - Distributed, scaleable and flexible monitoring system.
* [Bosun](http://bosun.org/) - Monitoring and alerting system by Stack Exchange ([Source Code](https://github.com/bosun-monitor/bosun), [Documentation](http://bosun.org/quickstart.html)) `MIT``Go`
* [Cacti](http://www.cacti.net) - Web-based network monitoring and graphing tool.
* [Cabot](http://cabotapp.com/) - Monitoring and alerts, similar to PagerDuty.
* [cadvisor](https://github.com/google/cadvisor) - Analyzes resource usage and performance characteristics of running containers ([Source Code](https://github.com/google/cadvisor)) `Apache``Go`
* [check_mk](http://mathias-kettner.com/check_mk.html) - Collection of extensions for Nagios.
* [Dash](https://github.com/afaqurk/linux-dash) - A low-overhead monitoring web dashboard for a GNU/Linux machine.
* [Icinga](https://www.icinga.org/) - Nagios fork that has since lapped nagios several times. Comes with the possibility of clustered monitoring - ([Source Code](https://github.com/Icinga)) - `GPLv2`
* [LibreNMS](http://www.librenms.org) - Fully featured network monitoring system that provides a wealth of features and device support.
* [Monit](http://mmonit.com/monit/#home) - Small utility for managing and monitoring Unix systems.
* [tcollector](http://opentsdb.net/docs/build/html/user_guide/utilities/tcollector.html) - System statistic collection daemon written in Python for OpenTSDB
* Dashboards
* [Grafana](http://grafana.org/) - A Graphite & InfluxDB Dashboard and Graph Editor.
* [Ganglia](http://ganglia.sourceforge.net/) - High performance, scalable RRD based monitoring for grids and/or clusters of servers. Compatible with Graphite using a single collection process.
* [RRDtool](http://oss.oetiker.ch/rrdtool/) - Industry standard, high performance data logging and graphing system for time series data.
* [Dashing](http://dashing.io/) - Ruby gem that allows for rapid statistical dashboard development. An all HTML5 approach allows for big screen displays in data centers or conference rooms.
* [Facette](http://facette.io) - Time series data visualization and graphing software written in Go.
* [Freeboard](https://github.com/Freeboard/freeboard) - A damn-sexy front-end real-time dashboard for the internet of things. Transforms raw JSON into delicious UI.
* [LibreMailer](https://github.com/averna-syd/LibreMailer) - Libre Mailer is a modest and simple web based email marketing application.
* [Lewsnetter](https://github.com/bborn/lewsnetter) - E-mail marketing application (create and send e-mail newsletter via SES). Includes subscription management, delivery, bounce and complaint notification, templates, and some stats.
* [Hypertable](http://hypertable.org/) - C++ based BigTable-like DBMS, communicates through Thrift and runs either as stand-alone or on distributed FS such as Hadoop.
* [Galera](http://galeracluster.com/) - Galera Cluster for MySQL is an easy-to-use high-availability solution with high system up-time, no data loss, and scalability for future growth.
* [MariaDB](https://mariadb.org/) - Community-developed fork of the MySQL.
* [Tiger VNC](http://tigervnc.org/) - TigerVNC is a high-performance, platform-neutral implementation of VNC (Virtual Network Computing), a client/server application that allows users to launch and interact with graphical applications on remote machines.
* [Remmina](http://www.remmina.org/wp/) - A Feature rich remote desktop application for linux and other unixes.
* [X2go](http://wiki.x2go.org/doku.php) - X2Go is an open source remote desktop software for Linux that uses the NX technology protocol.
* [Blackbox](https://github.com/StackExchange/blackbox) - Safely store secrets in Git/Mercurial. Provides tooling to automatically encrypt secrets like passwords.
* [fwknop](https://www.cipherdyne.org/fwknop/) - Protects ports via Single Packet Authorization in your firewall.
* [Glastopf](http://glastopf.org/) - A low-interaction web application honeypot to emulate vulnerabilities and gather attack data.
* [Kippo](https://github.com/desaster/kippo) - A medium-interaction SSH honeypot, mostly used as a standalone SSH daemon with a configurable Filesystem sandbox.
* [Linux Malware Detect](https://www.rfxn.com/projects/linux-malware-detect/) - A malware scanner for Linux designed around the threats faced in shared hosted environments.
* [Doozerd](https://github.com/ha/doozerd) - Doozer is a highly-available, completely consistent store for small amounts of extremely important data.
* [etcd](https://github.com/coreos/etcd) - distributed K/V-Store, authenticating via SSL PKI and a REST HTTP Api for shared configuration and service discovery.
* [ZooKeeper](http://zookeeper.apache.org/) - ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services.
* [Cachet](https://cachethq.io) - Status page system written in PHP.
* [Stashboard](http://www.stashboard.org) - Status page for cloud services and APIs.
* [System Status Dashboard (SSD)](http://www.system-status-dashboard.com/) - Overview about an organization's infrastructure health status.
* [Staytus](http://staytus.co/) - Staytus is a complete solution for publishing the latest information about any issues with your web applications, networks or services.
+ [grml](https://grml.org) – bootable Debian Live CD with powerful CLI tools.
* [mitmproxy](http://mitmproxy.org/) - A Python tool used for intercepting, viewing and modifying network traffic. Invaluable in troubleshooting certain problems.
* [Archipel](http://archipelproject.org/) - XMPP based virtualization management platform.
* [ConVirt](http://www.convirture.com/products_opensource.php) - Provides the core functionality for centrally managing your KVM or Xen virtualized environment.
* [Ganeti](https://code.google.com/p/ganeti/) - Cluster virtual server management software tool built on top of KVM and Xen.
* [KVM](http://www.linux-kvm.org) - Linux kernel virtualization infrastructure.
* [OpenNebula](http://opennebula.org/) - Flexible enterprise cloud made simple.
* [HAProxy](http://www.haproxy.org/) - Software based load Balancing, SSL offloading and performance optimization, compression, and general web routing.
* [Varnish](https://www.varnish-cache.org/) - HTTP based web application accelerator focusing on optimizing caching and compression.
* [The Linux Command Line](http://linuxcommand.org/tlcl.php) - A book about the Linux command line by William Shotts.
* [The Phoenix Project: A Novel about IT, DevOps, and Helping Your Business Win](http://itrevolution.com/books/phoenix-project-devops-book/) - How DevOps techniques can fix the problems that happen in IT organizations.
* [The Practice of System and Network Administration](http://everythingsysadmin.com/books.html) - The first and second editions describes the best practices of system and network administration, independent of specific platforms or technologies.
* [The Visible Ops Handbook: Implementing ITIL in 4 Practical and Auditable Steps](http://www.itpi.org/the-visible-ops-handbook-review.html) - Is a methodology designed to jumpstart implementation of controls and process improvement.
* [UNIX and Linux System Administration Handbook](http://www.admin.com/) - Approaches system administration from a practical perspective.
* [Web Operations Weekly](http://webopsweekly.com/) - A weekly newsletter on Web operations, infrastructure, performance, and tooling, from the browser down to the metal.
* [Software Collections](https://www.softwarecollections.org) - Community Release of [Red Hat Software Collections](https://access.redhat.com/documentation/en/red-hat-software-collections/). Provides updated packages of Ruby, Python, etc. for CentOS/Scientific Linux 6.x.
* [Ops School](http://www.opsschool.org) - Comprehensive program that will help you learn to be an operations engineer.
* [Digital Ocean Tutorials](https://www.digitalocean.com/community/tutorials) - A surprisingly vast resource for getting the basics of certain applications, tools, or even systems administration topics.
