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## top
`top`命令这个大家都非常的熟悉，他也是很多`LInux`发行版自带的系统工具，几乎每一个Linux程序员都会用过这个命令。`top` 可以实时动态地查看系统的整体运行情况，是一个综合了多方信息监测系统性能和运行信息的实用工具。通过top命令所提供的互动式界面，用热键可以管理。
vmstat
iostat
ifstat
dstat
netstat
perf
tcpdump
## Reference
https://www.open-open.com/lib/view/open1418970861542.html#articleHeader1
https://www.open-open.com/news/view/62d559