Apache Ambari Security
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Commands - Ambari Server

This section contains the specific commands that must be issued for standard server operations:

# Ambari Commands
ambari ALL=(ALL) NOPASSWD:SETENV: /bin/mkdir -p /etc/security/keytabs, /bin/chmod * /etc/security/keytabs/*.keytab, /bin/chown * /etc/security/keytabs/*.keytab, /bin/chgrp * /etc/security/keytabs/*.keytab, /bin/rm -f /etc/security/keytabs/*.keytab, /bin/cp -p -f /var/lib/ambari-server/data/tmp/* /etc/security/keytabs/*.keytab

To ensure that the configuration has been done properly, you can su to the ambari user and run sudo -l. There, you can double check that there are no warnings, and that the configuration output matches what was just applied.