Hadoop单节点搭建，运行官方grep实例

环境准备

centos 7
hadoop 2.7.7

环境安装

安装ssh
[root@swarm02 ~]# yum search ssh
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: centos.ustc.edu.cn
 * extras: ap.stykers.moe
 * updates: centos.ustc.edu.cn
============================================================================================================================== N/S matched: ssh ==============================================================================================================================
fence-agents-ilo-ssh.x86_64 : Fence agent for HP iLO devices via SSH
ksshaskpass.x86_64 : A KDE version of ssh-askpass with KWallet support
libssh.x86_64 : A library implementing the SSH protocol
libssh-devel.x86_64 : Development files for libssh
libssh2.i686 : A library implementing the SSH2 protocol
libssh2.x86_64 : A library implementing the SSH2 protocol
libssh2-devel.i686 : Development files for libssh2
libssh2-devel.x86_64 : Development files for libssh2
libssh2-docs.noarch : Documentation for libssh2
openssh.x86_64 : An open source implementation of SSH protocol versions 1 and 2
openssh-askpass.x86_64 : A passphrase dialog for OpenSSH and X
openssh-clients.x86_64 : An open source SSH client applications
openssh-keycat.x86_64 : A mls keycat backend for openssh
openssh-ldap.x86_64 : A LDAP support for open source SSH server daemon
openssh-server.x86_64 : An open source SSH server daemon
openssh-server-sysvinit.x86_64 : The SysV initscript to manage the OpenSSH server.
pam_ssh_agent_auth.i686 : PAM module for authentication with ssh-agent
pam_ssh_agent_auth.x86_64 : PAM module for authentication with ssh-agent
sshpass.x86_64 : Non-interactive SSH authentication utility
ansible.noarch : SSH-based configuration management, deployment, and task execution system
jsch.noarch : Pure Java implementation of SSH2
openssh-cavs.x86_64 : CAVS tests for FIPS validation
python-paramiko.noarch : SSH2 protocol library for python
python-paramiko-doc.noarch : Docs and demo for SSH2 protocol library for python

  Name and summary matches only, use "search all" for everything.
[root@swarm02 ~