Short answers, pulled from the story.
CSS Shenandoah was an iron-framed, teak-planked sailing ship with auxiliary steam power that served as a commerce raider for the Confederate States Navy. Originally a British merchant ship named Sea King, she was purchased secretly and commissioned on the 19th of October 1864 to capture and destroy Union merchant vessels. Over twelve-and-a-half months she seized 38 ships, mostly whalers.
Lieutenant Commander James Iredell Waddell of North Carolina commanded CSS Shenandoah for the entirety of her Confederate service. Waddell was a former US Navy officer and Mexican-American War naval combat veteran before he resigned his commission to serve the Confederacy.
CSS Shenandoah surrendered on the 6th of November 1865 on the River Mersey at Liverpool, United Kingdom, six months after the Civil War had effectively ended. Captain Waddell surrendered the ship to Captain Paynter of HMS Donegal, marking the last surrender of the American Civil War.
Waddell learned from a captured vessel on the 27th of June 1865 that Lee had surrendered, but the same San Francisco newspaper he was shown also carried President Davis's proclamation that the war would continue with renewed vigor. Waddell did not receive confirmation that the war was definitively over until the 3rd of August 1865, from the Liverpool barque Barracouta.
CSS Shenandoah fired the last shot of the Civil War, a warning shot across the bow of a whaler in waters off the Aleutian Islands. The shot was fired after the armies on land had already surrendered, making Shenandoah's distant ocean campaign the final armed action of the conflict.
After surrendering to the British at Liverpool on the 6th of November 1865, CSS Shenandoah was turned over to the United States government and sold to Matthew Isaac Wilson of Liverpool. Wilson sold her in 1867 to Majid bin Said, the first Sultan of Zanzibar, who renamed her El Majidi. She was eventually wrecked and sank in the Gulf of Aden off Socotra in November 1879.