Add Run A Command Repeatedly Several Times as a Unix TIL

unix/run-a-command-repeatedly-several-times.md

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+# Run A Command Repeatedly Several Times
+
+From the terminal in a Bash or Zsh shell session, I can loop on a command to
+have it run a specific number of times.
+
+If I want to run a test command (e.g. `bin/test some_file.spec:123`) 12 times
+in a row, I could use a for loop like so:
+
+```bash
+for i in {1..12}; do bin/test some_file.spec:123; done
+```
+
+And the shell will run the command one time after another until it has been run
+12 times. That range `{1..12}` can be adjusted to whatever I want. For
+instance, to have it loop 3 times, I'd make it into `{1..3}`.
+
+[source](https://serverfault.com/questions/273238/how-to-run-a-command-multiple-times-using-bash-shell)