How to set ulimit or change the default soft or hard limit for the number of user’s processes?

  Environment RHEL/CentOS 5 RHEL/CentOS 6 RHEL/CentOS 7 RHEL/CentOS 8 Issue The default configuration file for ulimit  is   /etc/security/limits.d/90-nproc.conf  for (RHEL5, RHEL6), /etc/security/limits.d/20-nproc.conf   for (RHEL7) and for RHEL 8 we have to create file  /etc/security/limits.d/20-nproc.conf specifies the default nproc limits as,: * soft nproc 1024 root soft nproc unlimited Even  when logged in as root, the ulimit shows a different value: $ …

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