无法在Ubuntu 12.04上启动mongodb-linux-2.4.1

无法在Ubuntu 12.04上启动mongodb-linux-2.4.1,mongodb,ubuntu,database,Mongodb,Ubuntu,Database,我已经下载了mongodb-linux-2.4.1 tarball。然后我解开它。转到mongodb-linux-2.4.1/bin文件夹,并从 ./mongo 然后我得到: li@li-HP:~/Tools/mongodb-linux-x86_64-2.4.1/bin$ ./mongo MongoDB shell version: 2.4.1 connecting to: test Fri Mar 29 19:29:47.958 JavaScript execution failed: Er

我已经下载了mongodb-linux-2.4.1 tarball。然后我解开它。转到mongodb-linux-2.4.1/bin文件夹,并从

./mongo
然后我得到:

li@li-HP:~/Tools/mongodb-linux-x86_64-2.4.1/bin$ ./mongo
MongoDB shell version: 2.4.1
connecting to: test
Fri Mar 29 19:29:47.958 JavaScript execution failed: Error: couldn't connect to 
server 127.0.0.1:27017 at src/mongo/shell/mongo.js:L112
exception: connect failed

有什么建议吗?

/mongo
只需运行mongodb客户端
/mongod
运行mongodb服务器