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if you make changes to /etc/sysconfig/network-scripts/ifcfg-eth0, then make sure you rm /etc/udev/rules.d/70-persistent-net.rules
Logs
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HDP File Locations
Binaries: /usr/lib/SERVICENAME
Configuration: /etc/SERVICENAME/conf
Logs: /var/log/hadoop (switch out hadoop for other ecosystem tools such as hbase or hive)SERVICENAME