Failed:error connecting to DB Server:server returned error on SASL authentication Step:authentica

One: Problem description

When backing up, error:

[root@ser6-51 ~]# mongodump-d mytest-o/backup/mongodb/all_bak_20150619.bak-u=superuser-p=123456

2015-06-29t10:17:10.784+0800 Failed:error connecting to DB Server:server returned error on SASL authentication Step:aut Hentication failed. II: Solutions

Add--authenticationdatabase Admin

Such as:

[root@ser6-51 mongodb]# mongodump-d mytest-o/backup/mongodb/all_bak_20150619.bak-u superuser-p=123456--authenticat Iondatabase Admin

2015-06-29t10:24:21.427+0800 Writing myTest.system.indexes to/backup/mongodb/all_bak_20150619.bak/mytest/ System.indexes.bson

2015-06-29t10:24:21.428+0800 Writing mytest.t To/backup/mongodb/all_bak_20150619.bak/mytest/t.bson

2015-06-29t10:24:21.428+0800 Writing Mytest.t2 To/backup/mongodb/all_bak_20150619.bak/mytest/t2.bson

2015-06-29t10:24:21.429+0800 Writing mytest.t Metadata to/backup/mongodb/all_bak_20150619.bak/mytest/ T.metadata.json

2015-06-29t10:24:21.429+0800 Writing MYTEST.T2 Metadata to/backup/mongodb/all_bak_20150619.bak/mytest/ T2.metadata.json

2015-06-29t10:24:21.468+0800 Done Dumping MYTEST.T2

2015-06-29t10:24:21.468+0800 Done Dumping MYTEST.T

--Note: When specifying a password, you must add ' = Password ' after-p, otherwise error: Error parsing command line options:expected argument for flag '-p,--password '