[root@iZ7xva19gbvp6vpiyzc1w7Z log]# mongod --verbose --logpath /data/mongodb/log/mongod.log --logappend --dbpath /data/mongodb/db --fork --bind_ip 0.0.0.0

about to fork child process, waiting until server is ready for connections.

forked process: 9755

ERROR: child process failed, exited with 48

To see additional information in this output, start without the "--fork" option.

查过以往的问题记录，发现bin或者db目录中没有mongod.lock这个文件。