yum包管理是使用python2.x写的，将python2.x升级到python3.1.3以后，由于python版本语法兼容性导致问题出现解决办法：修改yum配置文件，将python版本指向以前的旧版本vi/usr/bin/yum#!/usr/bin/python2.712修改urlgrabber-ext-down文件，更改python版本vi/usr/libexec/urlgrabber-ext
chmod+x/etc/init.d/mysqldchkconfig--addmysqldchkconfig--level2345mysqldonservicemysqldstartchkconfig--listservicemysqldstatus
需要手工拷贝mysql-connector-java-5.1.7-bin.jar以下目录下/usr/share/cmf/lib/usr/lib/sqoop/lib/usr/lib/hive/lib
https://www.cnblogs.com/pojishou/archive/2017/01/12/6267616.html
http://blog.csdn.net/u013980127/article/details/53957012
hadoop文件上传sudo-uhdfshadoopfs-put20171204/查看文件hadoopfs-ls/进入hadoop配置文件，查看vi/etc/hadoop/conf/hdfs-site.xml找到hdfs的路径dfs/nn进入路径cd/dfs/nn查看name的文件信息ls
要加一个斜杠，标识绝对路径hadoopfs-ls/
https://www.cnblogs.com/qq503665965/p/6696675.html
祝贺
加上"--nogpgcheck"参数
Starting httpd: httpd: Could not reliably determine the server's fully qualified domain name, using 192.168.229.152 for ServerName(2)No such file or directory: httpd: could not open error log file /et
service cloudera-scm-server start会报错，说mysql驱动，下载mysql的jar包https://dev.mysql.com/downloads/connector/j/解压放到路径/usr/share/cmf/lib目录下再执行service cloudera-scm-server start就可以了
cloudera-manager提示安装成功，但是服务根本没有启动，仍然查看/var/log/cloudera-scm-server.log显示一个 could not translate host name “localhost”, service “5432″ to address: Name or service not known的错误解决办法如下：在/etc/hosts文件下增
http://blog.csdn.net/yhl27/article/details/37726639
1、安装postgresql在离线安装CM时，有时会报如下的错误：Resolving Dependencies --> Running transaction check ---> Package cloudera-manager-server-db-2.x86_64 0:5.0.2-1.cm502.p0.297.e
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