Installed memcached via homebrew, how to start and stop server?

When you installed it, it put a file named homebrew.mxcl.memcached.plist in /usr/local/Cellar/memcached/$version/; you copy that file into ~/Library/LaunchAgents and then tell launchd to start it with launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.memcached.plist.

If you were watching the console carefully during the brew install command, it should have said something about doing these exact steps. If you run brew info it'll re-print this information, e.g. brew info memcached.

You should probably read https://docs.brew.sh/Manpage -- it has more useful documentation including the brew remove command which will remove the package if you decide you don't want it.

1. Brew used to have a command brew services (https://thoughtbot.com/blog/starting-and-stopping-background-services-with-homebrew), now deprecated. Instead, to get always-correct advice, run this command:

   brew info memcached
   

2. Via telnet: telnet localhost 11211

   See also What are some useful tips/tools for monitoring/tuning memcached health?

3. brew remove memcached