Training · Linux fundamentals

The analogy. A city with one rule: everything is an address. Files, disks and even running processes have a path, which is why the same three tools can inspect all of them.

The shell is the classroom: the lecture behind this lab covers the mental model, the commands you are about to use, and the four things that usually go wrong.

Read the lecture before you start
all labs

Permissions II: Recursive & Ownership

Advanced22 min0/3 activities

Lock down a website tree: tighten every directory, hand ownership to root, then open one public file.

Activities

  1. 01Set every directory under /opt/site to mode 750

    /opt/site and all of its subdirectories must be rwxr-x---.

  2. 02Make root own the whole /opt/site tree

    Every entry must have owner and group root.

  3. 03Open /opt/site/public/index.html to exactly 644

    That one file must be rw-r--r--.

student@ophir-lab — linux-perms-02
bash 5.2 · x86_64 (wasm)isolated · no network egress