XK0-006 Troubleshooting Practice Question
A Linux administrator needs to check which services are listening on TCP ports on a server. Which command should be used to replace the deprecated netstat command?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
ss -tlnp
The ss command is the modern replacement for netstat, and ss -tlnp shows listening TCP ports with process information.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
ss -tlnp
Why this is correct
The `ss -tlnp` command uses the `-t` flag to filter only TCP sockets, `-l` to show only listening sockets, `-n` to display numeric addresses and ports without DNS resolution, and `-p` to reveal the process identifier and name. This directly replaces `netstat -tlnp` by reading socket information from the kernel’s `/proc/net/tcp` and `/proc/net/tcp6` files, satisfying the stem’s requirement to check services listening on TCP ports.
- ✗
nmap localhost
Why it's wrong here
nmap is a port scanner, not the standard tool for quick listening port checks.
- ✗
ip link show
Why it's wrong here
ip link show displays network interfaces, not listening ports.
- ✗
dig -t any localhost
Why it's wrong here
dig is for DNS queries, not for checking listening ports.
Go deeper
Related to this question
Learn chapter
Linux Fundamentals and History
Key term
Process
In IT service management, a process is a structured set of activities designed to accomplish a specific objective, such as managing incidents or changes, by transforming inputs into defined outputs.
Key term
Linux
Linux is an open-source operating system that manages computer hardware and software, widely used in servers, desktops, and embedded systems.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This XK0-006 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the XK0-006 exam.