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10 Security Commands Every Linux Admin Should Know (But Probably Doesn’t)
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🎯 Why this works:
- Focuses on hands-on commands — instantly actionable
- Feels like an insider’s guide — even pros will stop and ask “do I know all 10?”
- It’s a listicle (great for scroll-friendly reading)
- Tied to real-world threats and day-to-day Linux security hardening
🧠 Article Outline:
Intro:
Linux is known for being secure, but only if you configure it correctly. Most sysadmins and developers know the basics — but some powerful tools are underused, overlooked, or just flat-out unknown. I’ve compiled 10 real security commands I use to lock down servers (Ubuntu & CentOS), audit them, and sleep better at night.
1. ss -tuln
See what’s listening and reduce attack surface:
ss -tuln
Why it matters: You can’t secure what you don’t know is open.
2. find / -perm -4000 2>/dev/null
Find all SUID binaries — potential privilege escalation risks.
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