Linux Filesystem Hierarchy - etc, var, usr, and proc

The Filesystem Hierarchy Standard puts each class of file in a predictable directory so an admin can find a config, a binary, or a log without hunting the whole disk. /etc holds static host configuration, not binaries. /usr holds the programs and their manual pages. /var holds data that changes while the system runs, including logs. /proc is not a normal directory of files on disk. It is a window the kernel publishes into live process and hardware state.

You will read /etc/os-release and your login shell, find mkdir under /usr and a log under /var/log, then prove /proc/uptime is live kernel state and that /tmp carries the sticky bit.

Objectives

By completing this beginner lab, you will be able to:

• Record the live OS ID from /etc/os-release and your login shell from passwd field 7
• Record the live command -v mkdir path, the man -w mkdir path, and one log file that exists under /var/log right now
• Record a /proc/uptime sample and the octal mode of /tmp
• State honestly that /proc inside this container reports the host kernel, and /boot is effectively absent

Who is this lab for?

This lab is designed for:

• IT Administrator Foundations learners who finished Linux Shell Basics
• Helpdesk students who need the map before they change anything