subtree(users/wpcarro): docking briefcase at '24f5a642'

git-subtree-dir: users/wpcarro
git-subtree-mainline: 464bbcb15c
git-subtree-split: 24f5a642af
Change-Id: I6105b3762b79126b3488359c95978cadb3efa789

users/wpcarro/playbooks/shell.md

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+# Shell
+
+I'm making this as an offline reference for some of the commands that I use
+often enough to need to remember but not often enough to *actually* remember.
+
+## Reference
+
+- To kill a process by its port number:
+
+```shell
+$ fuser 8080/tcp
+```