操作系统：Centos,Ubuntu,Redhat,suse,Freebsd
网站服务：nginx,apache,lighttpd,php,tomcat,resin
数据库：MySQL,MariaDB,PostgreSQL
DB中间件：maxscale,MyCat,atlas,cobar,amoeba,MySQL-proxy
代理相关：lvs,keepalived,haproxy,nginx,heartbeat
网站缓存：squid,nginx,varnish
NOSQL库：Redis,Memcached,MongoDB,HBase,Cassandra,CouchDB
存储相关：Nfs,FastDFS,Moosefs(mfs),Hadoop,glusterfs,lustre
版本管理：svn,git
监控报警：nagios,cacti,zabbix,munin,hyperic,mrtg,graphite
域名解析：bind,powerdns,dnsmasq
同步软件：scp,rsync,inotify,sersync,drbd
批量管理：SSH,Ansible,Saltstack,expect,puppet
虚拟化：kvm,xen
云计算：openstack,docker,cloudstack
内网软件：iptables,zebra,iftraf,ntop,tc,iftop
邮件软件：qmail,posfix,sendmail,zimbra
远程拨号：openvpn,pptp,openswan,ipip
统一认证：openldap
队列工具：ActiveMQ,RabbitMQ,Metaq,MemcacheQ,Zeromq
打包发布：mvn,ants,jenkins
测试软件：ab,JMeter,Webbench,LoadRunner,http_load,tcpcopy
带宽测试：smokeping
性能测试：dd,fio(IOPS测试),iozone(磁盘测试)
日志相关：rsyslog,Awstats,flume,storm,ELK(Elasticsearch+Logstash+Kibana)
搜索软件：Sphinx,Xapian,Solr
无人值守：kickstart,cobbler
软件安装：rpm,yum（设计rpm包定制及yum仓库构建）
大数据：HDFS,Hive,Hbase,Zookeeper,Pig,Spark,Mahout,flume,sqoop
开发语言：Shell,Python,go
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下一阶段需要加强学习：