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  • Hadoop 免密码登陆(ssh)

    record save here first

    [root@hadoop .ssh]# ssh-keygen -t rsa -P ''
    Generating public/private rsa key pair.
    Enter file in which to save the key (/root/.ssh/id_rsa): id_rsa
    Your identification has been saved in id_rsa.
    Your public key has been saved in id_rsa.pub.
    The key fingerprint is:
    5c:9a:67:12:49:6d:2d:ce:7e:da:fc:e3:ff:df:e5:58 root@hadoop
    [root@hadoop .ssh]# ls
    backup  id_rsa  id_rsa.pub  known_hosts
    [root@hadoop .ssh]# cp  id_rsa.pub  authorized_keys
    [root@hadoop .ssh]# ls
    authorized_keys  backup  id_rsa  id_rsa.pub  known_hosts
    [root@hadoop .ssh]# start-all.sh
    starting namenode, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-namenode-hadoop.out
    localhost: starting datanode, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-datanode-hadoop.out
    localhost: starting secondarynamenode, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-secondarynamenode-hadoop.out
    starting jobtracker, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-jobtracker-hadoop.out
    localhost: starting tasktracker, logging to /usr/local/hadoop/libexec/../logs/hadoop-root-tasktracker-hadoop.out
    [root@hadoop .ssh]#

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  • 原文地址:https://www.cnblogs.com/fjsnail/p/4331250.html
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