mongodb之常用命令

help                         show help show dbs                     show database names show collections             show collections in current database show users                   show users in current database show profile                 show most recent system.profile entries with  time >= 1ms use <db name>                set curent database to <db  name>   db.addUser (username, password) db.removeUser(username)   db.cloneDatabase(fromhost) db.copyDatabase(fromdb, todb, fromhost) db.createCollection(name, { size : ..., capped : ..., max : ... } )   db.getName() db.dropDatabase()  // runs the collstats] command on each collection in the  database db.printCollectionStats()   db.currentOp() displays the current operation in the db db.killOp() kills the current operation in the db   db.getProfilingLevel() db.setProfilingLevel(level) 0=off 1=slow 2=all   db.getReplicationInfo() db.printReplicationInfo() db.printSlaveReplicationInfo() db.repairDatabase()   db.version() current version of the server   db.shutdownServer()   ======ddl   db.foo.drop() drop the collection db.foo.dropIndex(name) db.foo.dropIndexes() db.foo.getIndexes() db.foo.ensureIndex(keypattern,options) - options object has these  possible                                          fields: name, unique,  dropDups   db.foo.find( [query] , [fields])       - first parameter is an  optional                                          query filter. second  parameter                                          is optional                                          set of fields to return .                                        e.g. db.foo.find(                                                   { x : 77 } ,                                                   { name : 1 , x : 1 }  ) db.foo.find(...).count() db.foo.find(...).limit(n) db.foo.find(...).skip(n) db.foo.find(...).sort(...) db.foo.findOne([query])   db.foo.getDB() get DB object associated with collection   db.foo.count() db.foo.group( { key : ..., initial: ..., reduce : ...[, cond: ...] }  )   db.foo.renameCollection( newName ) renames the collection   db.foo.stats() db.foo.dataSize() db.foo.storageSize() - includes free space allocated to this collection db.foo.totalIndexSize() - size in bytes of all the indexes db.foo.totalSize() - storage allocated for all data and indexes db.foo.validate() (slow)   db.foo.insert(obj) db.foo.update(query, object[, upsert_bool]) db.foo.save(obj) db.foo.remove(query)                   - remove objects matching  query                                          remove({}) will remove  all 粘贴自： <http://www.mongodb.org/display/DOCS/DBA+Operations+from+the+Shell>