memcached(1) on Linux
The text e3e99403e218, as Debian 7 (Wheezy) shipped it.
high-performance memory object caching system
Flags it lists
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-B -
-C -
-D -
-I -
-L -
-M -
-P -
-R -
-U -
-a -
-c -
-d -
-f -
-h -
-i -
-k -
-l -
-m -
-n -
-o -
-p -
-r -
-s -
-t -
-u -
-v -
-vv -
-vvv