SELinux and Auditd

An introductory blog post on SELinux and Auditd for CentOS 7/8 that demonstrates how to view SELinux contexts (ps -Z, ls -Z), manage booleans (getsebool, setsebool), inspect and extend policy files (selinux-policy-devel), and craft Auditd rules to monitor file changes and syscalls. The post highlights permissions like execmem/execheap and booleans such as deny_ptrace and deny_execmem, gives sample Auditd rules (e.g., watching /etc/passwd and logging root execve), and links multiple resources for deeper study.