sudo bin/hadoop namenode -format

lee1@ubuntu:/home/app/hadoop-0.20.203.0$ sudo bin/hadoop namenode -format
12/01/15 04:58:28 INFO namenode.NameNode: STARTUP_MSG:
/************************************************************
STARTUP_MSG: Starting NameNode
STARTUP_MSG:   host = ubuntu/127.0.1.1
STARTUP_MSG:   args = [-format]
STARTUP_MSG:   version = 0.20.203.0
STARTUP_MSG:   build = http://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.20-security-203 -r 1099333; compiled by 'oom' on Wed May  4 07:57:50 PDT 2011
************************************************************/
12/01/15 04:58:29 INFO util.GSet: VM type       = 32-bit
12/01/15 04:58:29 INFO util.GSet: 2% max memory = 19.33375 MB
12/01/15 04:58:29 INFO util.GSet: capacity      = 2^22 = 4194304 entries
12/01/15 04:58:29 INFO util.GSet: recommended=4194304, actual=4194304
12/01/15 04:58:30 INFO namenode.FSNamesystem: fsOwner=root
12/01/15 04:58:30 INFO namenode.FSNamesystem: supergroup=supergroup
12/01/15 04:58:30 INFO namenode.FSNamesystem: isPermissionEnabled=true
12/01/15 04:58:30 INFO namenode.FSNamesystem: dfs.block.invalidate.limit=100
12/01/15 04:58:30 INFO namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0 min(s), accessTokenLifetime=0 min(s)
12/01/15 04:58:30 INFO namenode.NameNode: Caching file names occuring more than 10 times
12/01/15 04:58:30 INFO common.Storage: Image file of size 110 saved in 0 seconds.
12/01/15 04:58:31 INFO common.Storage: Storage directory /tmp/hadoop-root/dfs/name has been successfully formatted.
12/01/15 04:58:31 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at ubuntu/127.0.1.1
************************************************************/