我创建了一个/ data / db文件，这曾经工作，我不知道发生了什么变化，但是当我尝试创建一个新的Schema并使用mongod测试它时，我收到以下错误：
2017-12-26T11:08:35.428-0500 I CONTROL [initandlisten] MongoDB starting : pid=41342 port=27017 dbpath=/data/db 64-bit host=Carloss-MBP.home
2017-12-26T11:08:35.429-0500 I CONTROL [initandlisten] db version v3.4.10
2017-12-26T11:08:35.429-0500 I CONTROL [initandlisten] git version: 078f28920cb24de0dd479b5ea6c66c644f6326e9
2017-12-26T11:08:35.429-0500 I CONTROL [initandlisten] OpenSSL version: OpenSSL 1.0.2m 2 Nov 2017
2017-12-26T11:08:35.429-0500 I CONTROL [initandlisten] allocator: system
2017-12-26T11:08:35.429-0500 I CONTROL [initandlisten] modules: none
2017-12-26T11:08:35.429-0500 I CONTROL [initandlisten] build environment:
2017-12-26T11:08:35.429-0500 I CONTROL [initandlisten] distarch: x86_64
2017-12-26T11:08:35.429-0500 I CONTROL [initandlisten] target_arch: x86_64
2017-12-26T11:08:35.429-0500 I CONTROL [initandlisten] options: {}
2017-12-26T11:08:35.429-0500 I STORAGE [initandlisten] exception in initAndListen: 98 Unable to lock file: /data/db/mongod.lock Resource temporarily unavailable. Is a mongod instance already running?, terminating
2017-12-26T11:08:35.429-0500 I NETWORK [initandlisten] shutdown: going to close listening sockets...
2017-12-26T11:08:35.429-0500 I NETWORK [initandlisten] shutdown: going to flush diaglog...
2017-12-26T11:08:35.429-0500 I CONTROL [initandlisten] now exiting
2017-12-26T11:08:35.429-0500 I CONTROL [initandlisten] shutting down with code:100
mongo服务器运行良好的命令mongo，我是否还必须手动创建一个/data/db/mongod.lock文件？不知道这里发生了什么......
看起来你已经有一个mongod进程正在运行。使用'ps'命令检查并在必要时终止。它可能会锁定您的/ data / db目录。此命令应该适合您
mongod --shutdown