Update cheatsheets

linux/iostat

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# iostat
+
+> Report statistics for devices and partitions.
+> More information: <https://manned.org/iostat>.
+
+- Display a report of CPU and disk statistics since system startup:
+
+`iostat`
+
+- Display a report of CPU and disk statistics with units converted to megabytes:
+
+`iostat -m`
+
+- Display CPU statistics:
+
+`iostat -c`
+
+- Display disk statistics with disk names (including LVM):
+
+`iostat -N`
+
+- Display extended disk statistics with disk names for device "sda":
+
+`iostat -xN {{sda}}`
+
+- Display incremental reports of CPU and disk statistics every 2 seconds:
+
+`iostat {{2}}`