node.js - MongoDB:期望:连接失败，退出代码 1

Question

因此，在我的 Ubuntu 中安装 mongodb 后，我尝试运行“mongo”，但它说，

MongoDB shell version v4.4.1
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
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 :: Connection refused :
connect@src/mongo/shell/mongo.js:374:17
@(connect):2:6
exception: connect failed
exiting with code 1

所以我启用了mongod服务并启动它，然后运行命令，

sudo systemctl status mongod

它说，

● mongod.service - MongoDB Database Server
     Loaded: loaded (/lib/systemd/system/mongod.service; enabled; vendor preset: enabled)
     Active: failed (Result: exit-code) since Thu 2020-09-17 00:23:08 +06; 8min ago
       Docs: https://docs.mongodb.org/manual
    Process: 45414 ExecStart=/usr/bin/mongod --config /etc/mongod.conf (code=exited, sta>
   Main PID: 45414 (code=exited, status=1/FAILURE)

Sep 17 00:23:08 john systemd[1]: Started MongoDB Database Server.
Sep 17 00:23:08 john mongod[45414]: about to fork child process, waiting until server is>
Sep 17 00:23:08 john mongod[45427]: forked process: 45428
Sep 17 00:23:08 john mongod[45414]: ERROR: child process failed, exited with error numbe>
Sep 17 00:23:08 john mongod[45414]: To see additional information in this output, start >
Sep 17 00:23:08 john systemd[1]: mongod.service: Main process exited, code=exited, statu>
Sep 17 00:23:08 john systemd[1]: mongod.service: Failed with result 'exit-code'.

而且我无法运行 mongodb shell。我该怎么办？

Answer 1

mongod 需要先运行，然后才能运行 mongo 而不会出现该错误。
附言这是从标题中偶然发现原始问题的其他人的答案