Job for mongod.service failed because the control process exited with error code. See "systemctl status mongod.service" and "journalctl -xe" for details

我这边centos安装mongodb启动报错，有mongo版本，是因为删除了配置文件“/etc/mongod.conf”

解决办法：把  /etc/mongod.conf_bak复制到  /etc/mongod.conf

cp /etc/mongod.conf_bak /etc/mongod.conf