oot@dvcliftonhera141:~# grep -r pam_limits.so /etc/pam.d/
/etc/pam.d/login:session    required   pam_limits.so
/etc/pam.d/common-session:session required pam_limits.so
/etc/pam.d/su: session    required   pam_limits.so
/etc/pam.d/atd:session    required   pam_limits.so
/etc/pam.d/cron:session    required   pam_limits.so
/etc/pam.d/sshd:session    required     pam_limits.so
root@dvcliftonhera141:~# su - hdfs
-su: ulimit: open files: cannot modify limit: Operation not permitted
hdfs@dvcliftonhera141:~$