This will display the output from running `uname -a’ on your system. In other words, it will display some interesting info about the kernel you are running and your operating system.
(defun erc-cmd-UNAME (&rest ignore)
"Display the result of running `uname -a' to the current ERC
buffer."
(let ((uname-output
(replace-regexp-in-string
"[ \n]+$" "" (shell-command-to-string "uname -a"))))
(erc-send-message
(concat "{uname -a} [" uname-output "]"))))