1. mac mongodb 连接

mongod --dbpath /usr/local/var/mongodb --logpath /usr/local/var/log/mongodb/mongo.log --fork

2. 常见错误

1. mongod.lock

about to fork child process, waiting until server is ready for connections.
forked process: 4974
ERROR: child process failed, exited with 1
To see additional information in this output, start without the "--fork" option.

非正常退出会生成 mongod.lock， 进入 --dbpath 指定目录删除即可

 cd ~/usr/local/var/mongodb --logpath 
 rm -rf mongod.lock