Chapter 2. Performance Monitoring Tools
/proc"file system" is a directory that contains a hierarchy of files that represent the current state of the Linux kernel. It allows users and applications to see the kernel's view of the system.
/procdirectory also contains information about system hardware and any currently running processes. Most files in the
/procfile system are read-only, but some files (primarily those in /proc/sys) can be manipulated by users and applications to communicate configuration changes to the kernel.
/procdirectory, refer to the Red Hat Enterprise Linux 7 System Administrator's Guide.