SCLAFREE until 15 June 2026Intermediate

StackCracker Certified Linux Administrator

Prove you can pwn a Linux machine under real exam conditions.

Book Exam — Free
After 15 June 2026£29
Duration
1 Hour
Flags
5 flags
Pass mark
4/5 flags
Price
£29
Format
Practical CTF
Certificate
Instant

Who is this for?

→Aspiring penetration testers preparing for OSCP or eJPT
→CTF players who want a recognised credential
→Developers and sysadmins who want to understand Linux security
→Anyone who wants to prove hands-on Linux skills to employers

Skills tested

✓Linux enumeration and file system navigation
✓SUID binary exploitation
✓GPG encryption and decryption
✓Cron job abuse for privilege escalation
✓Password cracking with John the Ripper
✓Lateral movement between user accounts

What the exam covers

🚩Chained 5-flag investigation scenario
🚩Real privilege escalation techniques
🚩No hints — pure enumeration skills tested
🚩Story-based CTF — Operation CyberCorp

Why StackCracker?

🎯
Real environment
Live vulnerable Linux machine — not a simulator
⚡
Instant certificate
Pass the threshold and your cert is generated in seconds
🔐
Verifiable credential
Unique URL anyone can verify — share on LinkedIn
💰
One-time fee
Pay once, keep your certificate forever
LIMITED TIME — FREE ACCESS

Ready to get certified?

Free for everyone until 15 June 2026. After that, £29 per attempt.

No subscription. No monthly fee. Pay once, keep your certificate forever.

Book your free exam →