MongoDB shutting down with code:12 - mongodb

Question

I have saved my data yesterday, but when I tried to open my MongoDB via command Prompt and fire the command mongod its throwing out the following messages
>C:\mongodb\bin>mongod
>2018-07-20T16:21:25.350+0530 I CONTROL [main] Automatically disabling TLS 1.0, >to force-enable TLS 1.0 specify --sslDisabledProtocols 'none'
>2018-07-20T16:21:25.842+0530 I CONTROL [initandlisten] MongoDB starting : >pid=13544 port=27017 dbpath=C:\data\db\ 64-bit host=DESKTOP-4H7RM2O
>2018-07-20T16:21:25.842+0530 I CONTROL [initandlisten] targetMinOS: Windows >7/Windows Server 2008 R2
>2018-07-20T16:21:25.843+0530 I CONTROL [initandlisten] db version v4.0.0
>2018-07-20T16:21:25.843+0530 I CONTROL [initandlisten] git version: >3b07af3d4f471ae89e8186d33bbb1d5259597d51
>2018-07-20T16:21:25.843+0530 I CONTROL [initandlisten] allocator: tcmalloc
>2018-07-20T16:21:25.843+0530 I CONTROL [initandlisten] modules: none
>2018-07-20T16:21:25.843+0530 I CONTROL [initandlisten] build environment:
>2018-07-20T16:21:25.843+0530 I CONTROL [initandlisten] distmod: 2008plus->ssl
>2018-07-20T16:21:25.843+0530 I CONTROL [initandlisten] distarch: x86_64
>2018-07-20T16:21:25.843+0530 I CONTROL [initandlisten] target_arch: x86_64
>2018-07-20T16:21:25.844+0530 I CONTROL [initandlisten] options: {}
>2018-07-20T16:21:25.844+0530 I STORAGE [initandlisten] exception in >initAndListen: NonExistentPath: Data directory C:\data\db\ not found., >terminating
>2018-07-20T16:21:25.844+0530 I CONTROL [initandlisten] now exiting
>2018-07-20T16:21:25.844+0530 I CONTROL [initandlisten] shutting down with >code:100
>
**Here is the command Prompt output when I fire mongo command**
<C:\mongodb\bin>mongo
<MongoDB shell version v4.0.0
<connecting to: mongodb://127.0.0.1:27017
<2018-07-20T16:28:01.594+0530 E QUERY [js] Error: couldn't connect to server <127.0.0.1:27017, connection attempt failed: SocketException: Error connecting to <127.0.0.1:27017 :: caused by :: No connection could be made because the target <machine actively refused it. :
<connect#src/mongo/shell/mongo.js:251:13
<#(connect):1:6
<exception: connect failed
**This is my log file which is showing error =shutting down with code:12 **
>2018-07-20T15:43:37.425+0530 I CONTROL [initandlisten] ** WARNING: Access >control is not enabled for the database.
>2018-07-20T15:43:37.425+0530 I CONTROL [initandlisten] ** Read and >write access to data and configuration is unrestricted.
>2018-07-20T15:43:37.425+0530 I CONTROL [initandlisten]
>2018-07-20T15:43:37.425+0530 I CONTROL [initandlisten] ** WARNING: This server >is bound to localhost.
>2018-07-20T15:43:37.425+0530 I CONTROL [initandlisten] ** Remote >systems will be unable to connect to this server.
>2018-07-20T15:43:37.425+0530 I CONTROL [initandlisten] ** Start the >server with --bind_ip <address> to specify which IP
>2018-07-20T15:43:37.425+0530 I CONTROL [initandlisten] ** addresses it >should serve responses from, or with --bind_ip_all to
>2018-07-20T15:43:37.426+0530 I CONTROL [initandlisten] ** bind to all >interfaces. If this behavior is desired, start the
>2018-07-20T15:43:37.426+0530 I CONTROL [initandlisten] ** server with >--bind_ip 127.0.0.1 to disable this warning.
>2018-07-20T15:43:37.426+0530 I CONTROL [initandlisten]
>2018-07-20T15:43:40.388+0530 I FTDC [initandlisten] Initializing full-time >diagnostic data capture with directory 'C:/mongodb/data/db/diagnostic.data'
>2018-07-20T15:43:40.499+0530 I NETWORK [initandlisten] waiting for connections >on port 27017
>2018-07-20T15:45:42.106+0530 I CONTROL [thread1] Ctrl-C signal
>2018-07-20T15:45:42.106+0530 I CONTROL [consoleTerminate] got CTRL_C_EVENT, >will terminate after current cmd ends
>2018-07-20T15:45:42.106+0530 I NETWORK [consoleTerminate] shutdown: going to >close listening sockets...
>2018-07-20T15:45:42.325+0530 I CONTROL [consoleTerminate] Shutting down free >monitoring
>2018-07-20T15:45:42.326+0530 I FTDC [consoleTerminate] Shutting down full->time diagnostic data capture
>2018-07-20T15:45:42.334+0530 I STORAGE [consoleTerminate] WiredTigerKVEngine >shutting down
>2018-07-20T15:45:45.543+0530 I STORAGE [consoleTerminate] shutdown: removing fs >lock...
>2018-07-20T15:45:45.543+0530 I CONTROL [consoleTerminate] now exiting
>2018-07-20T15:45:45.543+0530 I CONTROL [consoleTerminate] shutting down with >code:12
I have ensured that my data path is correct but unable to solve this problem.

Answer 1

Try below:
Mac: Documents/mongodb/bin/mongod --dbpath Documents/data/db/
Window: "C:\Program Files\MongoDB\Server\3.6\bin\mongod.exe" --dbpath d:\test\mongodb\data
You just need to set db path.
You can set storage db path to the config file: Check this
And check this for window installation.

Answer 2

If you're using Linux just give increased permission to the storage file and restart mongodb it will work. Default storage file will be var/lib/mongodb. To give increased permissions use : chmod 777 mongod.