Awesome Sysadmin
A curated list of amazingly awesome sysadmin open source resources inspired by Awesome PHP
Backups
Backup software.
- Amanda - Client–server model backup tool.
 - Bacula - Another Client-server model backup tool.
 - UrBackup - Another client/server backup system.
 
Cloning
Cloning software.
- Clonezilla - Partition and disk imaging/cloning program.
 - Fog - Another computer cloning solution.
 
CMDB
Configuration management database.
- i-doit - Open Source IT Documentation and CMDB.
 - iTop - A complete open source, ITIL, web based service management tool.
 
Continuous integration
Continuous integration software.
- Go - Open source agile build and release management software.
 - Jenkins - An extendable open source continuous integration server.
 
DevOPs Tools
Configuration management tools.
- Ansible - It's written in Python and manages the nodes over SSH.
 - CFEngine - Lightweight agent system. Configuration state is specified via a declarative language.
 - Chef - It's written in Ruby and Erlang and uses a pure-Ruby DSL.
 - Puppet - It's written in Ruby and uses Puppet's declarative language or a Ruby DSL.
 - Salt - It's written in Python.
 
Network configuration management tools.
- RANCID - Monitors network device's configurarion and maintain history of changes.
 - rConfig - Another network device configuration management tool.
 
DNS
DNS servers.
- Bind - The most widely used name server software.
 - djbdns - A collection of DNS applications, including tinydns.
 - NSD - Authoritative only, high performance, simple name server.
 - PowerDNS - DNS server with a variety of data storage back-ends and load balancing features.
 
Hosting
Web hosting control panels
- ISPConfig - Hosting control panel for Linux.
 - Virtualmin - Control panel for Linux based on webmin.
 
IMAP/POP3
IMAP/POP3 mail servers.
- Courier IMAP/POP3 - Fast, scalable, enterprise IMAP and POP3 server.
 - Cyrus IMAP/POP3 - Intended to be run on sealed servers, where normal users are not permitted to log in.
 - Dovecot - IMAP and POP3 server written primarily with security in mind.
 - Qpopper - One of the oldest and most popular server implementations of POP3.
 
LDAP
LDAP servers.
- 389 Directory Server - Developed by Red Hat.
 - Apache Directory Server - Apache Software Foundation project written in Java.
 - OpenDS - Another directory server written in Java.
 - OpenLDAP - Developed by the OpenLDAP Project.
 
Monitoring
Monitoring software.
- Cacti - Web-based network monitoring and graphing tool.
 - Icinga - Fork of Nagios.
 - Monit - Small Open Source utility for managing and monitoring Unix systems.
 - Munin - Networked resource monitoring tool.
 - Nagios - Computer system, network and infrastructure monitoring software application.
 - Zabbix - Eenterprise-class software for monitoring of networks and applications
 - Zenoss - Application, server, and network management platform based on Zope.
 - Xymon - Network monitoring inspired by Big Brother.
 
Newsletters
Newsletter software.
- phpList - Newsletter manager.
 
NoSQL
NoSQL servers.
- Cassandra - Distributed DBMS designed to handle large amounts of data across many servers.
 - CouchDB - Ease of use, with multi-master replication document-oriented database system.
 - MongoDB - Another document-oriented database system.
 - Redis - Networked, in-memory, key-value data store with optional durability.
 - Riak - Another fault-tolerant key-value NoSQL database.
 
Comparison of NoSQL servers: http://kkovacs.eu/cassandra-vs-mongodb-vs-couchdb-vs-redis
RDBMS
Relational DBMS.
- MariaDB - Community-developed fork of the MySQL.
 - MySQL - Most popular RDBMS server.
 - Percona Server - Enhanced, drop-in MySQL replacement.
 - PostgreSQL - Object-relational database management system (ORDBMS).
 - SQLite - Library that implements a self-contained, serverless, zero-configuration, transactional SQL DBS.
 
SMTP
SMTP servers.
- Exim - Message transfer agent (MTA) developed at the University of Cambridge.
 - Qmail - Secure Sendmail replacement.
 - Postfix - Fast, easy to administer, and secure Sendmail replacement.
 - Sendmail - Message transfer agent (MTA).
 
SSH
SSH tools.
- Cluster SSH - Controls a number of xterm windows via a single graphical console.
 - parallel-ssh - Provides parallel versions of OpenSSH and related tools.
 - SSH Power Tool - Execute commands and upload files to many servers simultaneously without using pre-shared keys.
 
Statistics
Analytics software.
- Piwik - Free and open source web analytics application.
 
Ticketing systems
Web-based ticketing system.
- Bugzilla - General-purpose bugtracker and testing tool originally developed and used by the Mozilla project.
 - MantisBT - Another web-based bug tracking system.
 - osTicket - Open source support ticket system.
 - Request Tracker - Ticket-tracking system written in Perl.
 
Troubleshooting
Troubleshooting Tools.
- Sysdig - Capture system state and activity from a running Linux instance, then save, filter and analyze.
 
Project Management
Web-based project management and bug tracking systems.
- Redmine - Written in ruby on rails.
 - The Bug Genie - Written in PHP.
 - Trac - Written in python.
 
Version control
Software versioning and revision control.
- Git - Distributed revision control and source code management (SCM) with an emphasis on speed.
 - Mercurial - Another distributed revision control.
 - Subversion - Client-server revision control system.
 
Virtualization
Virtualization software.
- KVM - Linux kernel virtualization infrastructure.
 - OpenVZ - Container-based virtualization for Linux
 - VirtualBox - Virtualization product from Oracle Corporation.
 - Xen - Virtual machine monitor for 32/64 bit Intel / AMD (IA 64) and PowerPC 970 architectures.
 
VPN
VPN software.
- OpenVPN - Uses a custom security protocol that utilizes SSL/TLS for key exchange.
 - strongSwan - Complete IPsec implementation for Linux.
 
Webmails
Webmail applications.
- RainLoop - Simple, modern & fast web-based IMAP client.
 - Roundcube - Browser-based IMAP client with an application-like user interface.
 
Web
Web servers.
- Apache - Most popular web server.
 - Cherokee - Lightweight, high-performance web server/reverse proxy.
 - Lighttpd - Web server more optimized for speed-critical environments.
 - Nginx - Reverse proxy, load balancer, HTTP cache, and web server.
 
Wikis
Wiki software.
- DokuWiki - Simple to use and highly versatile wiki that doesn't require a database.
 - Mediawiki - Used to power Wikipedia.
 
Resources
Various resources, such as books, websites and articles, for improving your skills and knowledge.
Books
Sysadmin related books.
- The Phoenix Project: A Novel about IT, DevOps, and Helping Your Business Win - How DevOps techniques can fix the problems that happen in IT organizations.
 
Editors
Open source code editors.
- Atom - A hackable text editor from Github.
 - Brackets - Open source code editor for web designers and front-end developers.
 - Geany - GTK2 text editor.
 
Websites
Useful sysadmin related websites.
- Ops School - Comprehensive program that will help you learn to be an operations engineer.
 - Dotdeb - Repository with LAMP updated packages.
 
Contributing
Please see CONTRIBUTING for details.