curl -O https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-3.2.9.tgz

tar zxvf mongodb-linux-x86_64-3.2.9.tgz

mkdir -p /usr/local/mongodb/data
touch /usr/local/mongodb/mongod.log
touch /usr/local/mongodb/mongodb.conf

./mongod --dbpath=/usr/local/mongodb/data --logpath=/usr/local/mongodb/mongod.log --logappend --port=27017 --fork

./mongod --config /usr/local/mongodb/mongodb.conf

dbpath=/usr/local/mongodb/data
logpath=/usr/local/mongodb/mongod.log
logappend = true 
port = 27017 
fork = true 
auth = true

 db.createUser({'user':"用户名","pwd":"密码",roles:[{'role':"角色权限（dbAdmin）",db:"admin"}]})