Hadoop 2.5.2 Environment Configuration

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1, Ssh:connect to host localhost Port 22:connection refused

This problem usually occurs because the SSH service is installed or started,

Ubuntu under Install ssh:sudo apt-get install Openssh-server

Fedora installation Ssh:yum Install Openssh-server

-See if the installation

[Email protected] java]$ Rpm-qa | grep "SSH"
Libssh2-1.4.3-10.fc20.x86_64
Openssh-clients-6.4p1-6.fc20.x86_64
Openssh-server-6.4p1-6.fc20.x86_64
Openssh-6.4p1-6.fc20.x86_64

-Check whether the service is started

[Email protected] java]$ PS-E | grep "SSH"
23419? 00:00:00 sshd

Systemctl Enable Sshd.service

2. Change the host name

For the Fedora13 version,

# HOSTNAME sub-segments in Vi/etc/sysconfig/network file

For the FEDORA20 version,

# Vi/ect/hostname

3. Change hosts to resolve host names

# vi/etc/hosts

4. Turn off the firewall

Service Iptables Stop

Hadoop 2.5.2 Environment Configuration