A collection of problems in the construction of Hadoop,hbase cluster environment (i.)

1. Let the virtual machine get the IP address of the network?
   Answer: Right-click the virtual machine
   
   Network adapter->network Connection is set to
   Bridged:connected directly to the physical network
   
2. When configuring SSH for free login, copy the
   
   WORKAROUND: Use the command: add-i option
   Ssh-copy-id-i id_rsa.pub Master2
   With option-I, when no value is passed or if the ~/.ssh/identity.pub file is inaccessible (not present), Ssh-copy-id displays the above error message (The-I option takes precedence over what will be ssh-add-l)

What is true in the 3.hadoop configuration file?
Answer: This parameter is not overwritten by the parameters that are loaded later. Variables can also be used in configuration files.

How does the 4.bin file install under Linux?
For:
1) Execute the chmod +x command on the downloaded binary file
chmod +x Jdk-6u21-linux-x64.bin
2) Execute the binary file:
./jdk-6u21-linux-x64.bin)
How does the 5..tar.gz file unzip under Linux?
For:
such as extracting files hadoop-2.2.0.tar.gz:
TAR-ZXVF hadoop-2.2.0.tar.gz-c/cloud/
6. Move the file command?
A: MV Original file (clip) target file (clip)
7. Delete a folder?
Answer: RM-RF file (folder)
8. Do I need to install zookeeper?
The default value of HBASE_MANAGES_ZK in the Conf/hbase-env.sh configuration document is True, which indicates that HBase uses its own zookeeper instance. However, the instance can only serve hbase in standalone or pseudo-distributed mode. When installing full distribution mode, you need to configure your own zookeeper instance. After configuring the Hbase.zookeeper.quorum attribute in the Hbase-siet.xml document, the system will be limited (typos?). Priority? Use the zookeeper list specified by this property. At this point, if the value of the HBASE_MANAGES_ZK variable is true, HBase will run zookeeper as part of itself when starting hbase, and its corresponding process is "hquorumpeer"; if the value of the variable is false, You must first manually run the zookeeper cluster specified by the Hbase.zookeeper.quorum property before starting HBase, and its corresponding process will appear as quorumpeermain. If you run zookeeper as part of HBase, zookeeper will be automatically closed when HBase is closed, or you will need to stop the zookeeper service manually.
This configuration is not installed separately.

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A collection of problems in the construction of Hadoop,hbase cluster environment (i.)