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Technologies to look into as a sysadmin

These are some of the technologies that I think are either established, or new and promising, but all useful for sysadmins, no matter what their level of expertise is. Some of them I am already familiar with, some are on my TODO list, some I am exploring currently. They all reflect my own taste, so YMMV.

Operating systems
Ubuntu
Programming/scripting languages
GoPython/Ruby
Configuration management
ChefAnsible
Monitoring/graphing/logging/searching
SensuGraphiteLogstashElasticSearch
Load balancer/Web server
HAProxyNginx
Relational databases
MySQLPostgreSQL
Non-relational distributed databases
RiakCassandra
Service discovery
etcdconsul
Virtualization
KVMVagrantDocker
Software defined networking (SDN)
Open vSwitch
IaaS
OpenStack
PaaS
CloudFoundry

This should keep most people in the industry busy for a while ;-)