Run ss -tulpn.
ss -tulpn
Mission 83
Ports and processes
Compare simulated listener and process views.
Server operationssspsgrep
Lesson 83 of 360
0/360 lessons
0/17 missions
Server operations · 7 minutes
New learnerrank
0XP
0%complete
learner@clairos:/home/learner $
Unix ops lab: type a command, press Enter
Instructions
7 minutes
Click any instruction for the command details, the why, and the common mistake to avoid.
Run ps.
ps
Run grep listen /etc/nginx/sites-available/learn.conf.
grep listen /etc/nginx/sites-available/learn.conf
Save progress
Keep learning across sessions.
Create a free account to sync completed lessons, XP, streaks, course status, and your next lesson across sessions.
Checking account status...
Progress sync is idle.
0XP
New learnerrank
0day streak
0best streak
0daily streak
0lessons
0courses
0missions
0tasks
Noverified
Progress sync stores completion IDs, scores, streaks, badges, and game settings. Terminal contents, editor snippets, lab scratch, email, and real names are never published on leaderboards or share cards.
Lesson support
What to notice while you play.
Read network and process clues together.
Use ss, ps, and grep listen.
Open ports are easier to explain when tied to a process.
- Treating a port number as enough context.
- Ignoring process ownership.
Reference
Commands in this lesson.
grep [-i] <text> <file>
Find literal text inside a file.
ps
Show training server processes.
ss|ip
Inspect simulated sockets and addresses.
ssh|scp|ssh-keygen
Practice SSH inspection and dry-run transfer shapes without network access.