Update cheatsheets

batch

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# batch
+
+> Execute commands at a later time when the system load levels permit.
+> Service atd (or atrun) should be running for the actual executions.
+> More information: <https://manned.org/batch>.
+
+- Execute commands from `stdin` (press `Ctrl + D` when done):
+
+`batch`
+
+- Execute a command from `stdin`:
+
+`echo "{{./make_db_backup.sh}}" | batch`
+
+- Execute commands from a given [f]ile:
+
+`batch -f {{path/to/file}}`