The tomcat8 changelog shows the following remark among others: General
• Tighten up the default file permissions for the .tar.gz distribution so no files or directories are world readable by default. Configure Tomcat to run with a default umask of 0027 which may be overridden by setting UMASK in setenv.sh. (markt) Where do I find "setenv.sh" in my tomcat9 (Ubuntu) distribution? root@mail:/var/lib# grep "^Umask:" /proc/`ps ax| grep tomcat | grep -v grep | awk '{print $1}'`/status Umask: 0027 -- Christoph
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