Linux系统中怎么备份和恢复MongoDB数据

-v [ --verbose ]           be more verbose (include multiple  times

                   for more verbosity e.g. -vvvvv)

--version               print the program's version and  exit

-h [ --host ] arg           mongo host to connect to (

                   name>/s1,s2 for sets)

--port arg              server port. Can also use --host

                   hostname:port

--ipv6                enable IPv6 support (disabled by

                   default)

-u [ --username ] arg         username

-p [ --password ] arg         password

--authenticationDatabase arg     user source (defaults to dbname)

--authenticationMechanism arg  (=MONGODB-CR)

                   authentication mechanism

--dbpath arg             directly access mongod database  files

                   in the given path, instead of

                   connecting to a mongod server -  needs

                   to lock the data directory, so  cannot

                   be used if a mongod is currently

                   accessing the same path

--directoryperdb           each db is in a separate directly

                   (relevant only if dbpath specified)

--journal               enable journaling (relevant only  if

                   dbpath specified)

-d [ --db ] arg            database to use

-c [ --collection ] arg        collection to use (some commands)

--objcheck              validate object before inserting

                   (default)

--noobjcheck             don't validate object before  inserting

--filter arg             filter to apply before inserting

--drop                drop each collection before import

--oplogReplay             replay oplog for point-in-time  restore

--oplogLimit arg           include oplog entries before the

                   provided Timestamp  (seconds[:ordinal])

                   during the oplog replay; the  ordinal

                   value is optional

--keepIndexVersion          don't upgrade indexes to newest  version

--noOptionsRestore          don't restore collection options

--noIndexRestore           don't restore indexes

--w arg (=0)             minimum number of replicas per  write