Usage: MCClient [options]

Options:

-h, --help            output usage information
-V, --version         output the version number
-l --list             list all key
-d --delete [key]     delete key
-f --flush            flush all
-g --get [key]        get value by key
-p --prefix [prefix]  delete key by prefix
-s --set [key:value]  set key value