Installation - rutgerkok/BetterEnderChest GitHub Wiki
Of course, you can just drop the plugin in the plugins folder, but if you want to use it's features, you'll need to know how!
Place the jar file in the plugins folder and (re)start the server. There will be a config.yml in plugins/BetterEnderChest.
World groups
If you happen to run MultiInv, Multiverse-Inventories or WorldInventories, BetterEnderChest will copy the group structure of that plugin. You can change BetterEnderChest's group structure afterwards, for example to allow bringing items over between two survival groups. When you make changes to the group structure in the other plugin, you'll need to manually update the group structure in BetterEnderChest.
Lockette and LWC
If you want to enable LWC or Lockette support, now would be a good time to do so. See the LWC guide or the Lockette guide.
Public chest
If you want to enable the public chest, set it's setting showOnOpeningUnprotectedChest to true. If (and only if) you have enabled Lockette and LWC support, users will still be able to open their private chest. If you are planning to enable /enderchest, also set showOnUsingCommand to true.
Command
If you want to enable /enderchest, grant the permission node betterenderchest.command.openinv.self to your users. Users can now remotely open their Ender Chest. If you want them to be able to remotely view their Ender Chest, but you don't want them to take or place items, grant the permission node betterenderchest.command.viewinv.self to your users.
Chest size
If you want the Ender Chest to have more or less slots, you can do so by changing the upgrade values in the config file (see the PrivateEnderChest section) and granting the the betterenderchest.slots.upgrade#, where N is the upgrade number. By default, only the permission nodes of the first two upgrades are checkd, but you can easily change this using the rankUpgrades setting.
Default Ender Chest
There's also a default Ender Chest: when a user opens his/her Ender Chest for the first time, the contents of the default Ender Chest are copied over to his/her chest. You can edit the contents of the default Ender Chest using /enderchest --defaultchest (or /bec openinv --defaultchest if another plugin stole the /enderchest command).
More information
There's a lot more to configurire, see the [configuration]] page for details. There are also a lot more [permission nodes to grant or deny, and there are also some useful administrative commands.