Initial Core 2 study project

labs/OS-9-linux-client-tools-lab.md

@@ -0,0 +1,89 @@
+# Lab OS-9: Linux Client Tools
+
+Domain:
+- 1.0 Operating Systems
+
+Works on:
+- Linux
+- Windows comparison practice
+
+## Goal
+
+Practice Linux commands that commonly appear on Core 2.
+
+## Linux Steps
+
+Run:
+
+```bash
+cat /etc/os-release
+whoami
+pwd
+ls -l
+cat /etc/passwd
+cat /etc/hosts
+cat /etc/resolv.conf
+cat /etc/fstab
+ip addr
+ip route
+df -h
+du -h
+ps aux
+top
+```
+
+Press `q` to quit `top`.
+
+Practice file commands:
+
+```bash
+mkdir linux-practice
+cd linux-practice
+echo "Core 2 Linux practice" > notes.txt
+cp notes.txt copy.txt
+mv copy.txt renamed.txt
+grep Linux notes.txt
+chmod u+x renamed.txt
+ls -l
+cd ..
+rm -r linux-practice
+```
+
+Record:
+- Distribution:
+- Current user:
+- Current directory:
+- DNS server:
+- Default gateway:
+- Root filesystem free space:
+- One process name:
+- Permission string before/after `chmod u+x`:
+
+## Windows Comparison Steps
+
+Run:
+
+```powershell
+dir
+taskmgr
+nslookup example.com
+tracert example.com
+```
+
+Record Linux equivalents:
+- `dir`:
+- Task Manager process view:
+- `nslookup`:
+- `tracert`:
+
+## What You Should Learn
+
+- `/etc/passwd` lists users.
+- `/etc/shadow` stores password hashes and is protected.
+- `/etc/hosts` maps names to IPs locally.
+- `/etc/resolv.conf` shows DNS resolver settings.
+- `/etc/fstab` controls startup mounts.
+- `chmod` changes permissions.
+- `top` and `ps` show processes.
+- `df` and `du` show storage usage.
+