MongoDB: exception in initAndListen: 20 Attempted to create a lock file on a read-only directory: /data/db, terminating

启动mongodb遇到的一个问题和解决：

转（http://blog.csdn.net/u012877472/article/details/51001025）

MongoDB: exception in initAndListen: 20 Attempted to create a lock file on a read-only directory: /data/db, terminal

sudo chown -R `id -u` /data/db
sudo chmod -R go+w /data/db
or

sudo chown -R $USER /data/db 
sudo chmod -R go+w /data/db