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Add iostat example. Improve langauge.

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Fixes #231.
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Joshua Levy 2015-07-29 23:35:42 -07:00
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@ -229,9 +229,9 @@ Notes:
- For web debugging, `curl` and `curl -I` are handy, or their `wget` equivalents, or the more modern [`httpie`](https://github.com/jakubroztocil/httpie).
- To know disk/cpu/network status, use `iostat`, `netstat`, `top` (or the better `htop`), and (especially) `dstat`. Good for getting a quick idea of what's happening on a system.
- To know current disk/cpu/network status, the classic tools are `iostat`, `netstat`, and `top` (or the better `htop`). Use `iostat -mxz 15` for basic CPU and detailed per-partition disk stats and performance insight.
- For a more in-depth system overview, use [`glances`](https://github.com/nicolargo/glances). It presents you with several system level statistics in one terminal window. Very helpful for quickly checking on various subsystems.
- For a quick overview of what's happening on a system, `dstat` is especially useful. For broadest overview with details, use [`glances`](https://github.com/nicolargo/glances).
- To know memory status, run and understand the output of `free` and `vmstat`. In particular, be aware the "cached" value is memory held by the Linux kernel as file cache, so effectively counts toward the "free" value.