About permissions for NetBackup for DB2 log files (UNIX)
NetBackup uses the /usr/openv/netbackup/logs directory tree not only for the recording of troubleshooting information, but for progress and communication updates to users and other NetBackup applications. Restrictive permissions on these directories can not only disable the collection of troubleshooting data, but also prevent the application itself from functioning correctly.
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About backing up archive log files with the user exit program