Handy commands

use admin
db.createUser({"user": "root", "pwd": passwordPrompt(), "roles": ["root"]})
db.dropUser("root")
db.auth( "user", passwordPrompt() )
use test
db.getSiblingDB("dbname")
db.currentOp()
db.killOp(123) // opid
db.fsyncLock()
db.fsyncUnlock()
db.getCollectionNames()
db.getCollectionInfos()
db.printCollectionStats()
db.stats()
db.getReplicationInfo()
db.printReplicationInfo()
db.isMaster()
db.hostInfo()
db.printShardingStatus()
db.shutdownServer()
db.serverStatus()
db.setSlaveOk()
db.getSlaveOk()
db.getProfilingLevel()
db.getProfilingStatus()
db.setProfilingLevel(1, 200) // 0 == OFF, 1 == ON with slowms, 2 == ON
db.enableFreeMonitoring()
db.disableFreeMonitoring()
db.getFreeMonitoringStatus()
db.createView("viewName", "sourceColl", [{$project:{department: 1}}])