Shared Memory Segment Leak

Diagnose /dev/shm filling up from orphaned shared memory segments.

A advanced Linux challenge worth 20 points. Solve it hands-on in a real Linux environment in your browser - no local setup, no fake shells.

The Challenge

df shows /dev/shm at 99%. A crashed message queue left orphaned shared memory segments. New service instances cannot start.

Your tasks:

• Confirm: df -h /dev/shm
• List all segments: ipcs -m
• Identify orphaned segments: nattch=0 means no process is attached — safe to remove
• Remove orphaned segments: ipcrm -m <shmid> for each
• Verify /dev/shm usage drops
• Write the count of removed segments to /tmp/shm_report.txt
• Run check to validate