Update cheatsheets

linux/sa

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+---
+syntax: markdown
+tags: [tldr, linux]
+source: https://github.com/tldr-pages/tldr.git
+---
+# sa
+
+> Summarizes accounting information. Part of the acct package.
+> Shows commands called by users, including basic info on CPU time spent processing and I/O rates.
+> More information: <https://manned.org/man/sa.8>.
+
+- Display executable invocations per user (username not displayed):
+
+`sudo sa`
+
+- Display executable invocations per user, showing responsible usernames:
+
+`sudo sa --print-users`
+
+- List resources used recently per user:
+
+`sudo sa --user-summary`