VibeInfra Labs IDE — Interactive Sandbox Playground

📖 Lesson Guide Beginner

Linux System & Permission Debugging

An application service user nobody failed to write logs to /var/log/app.log due to invalid file permissions.

Task Steps:

✓ 1. Inspect file stats: ls -la /var/log/app.log
◯ 2. Fix permissions: chmod 664 /var/log/app.log
◯ 3. Verify validation script: ./check.sh

💡 Need a Hint? Click to reveal

Run chmod 664 /var/log/app.log in the terminal panel to grant write permissions to the group and read access to all users.

#!/bin/sh
# VibeInfra Automated Evaluator Script

PERM=$(stat -c "%a" /var/log/app.log 2>/dev/null)
if [ "$PERM" = "664" ] || [ "$PERM" = "777" ]; then
  echo "[✓] PASS: File permissions successfully corrected."
  exit 0
else
  echo "[X] FAIL: Expected file permissions 664 on /var/log/app.log, got $PERM"
  exit 1
fi

bash — student@sandbox-linux-101

$ oneinfra lab start linux-debugging-101

[+] Provisioning ephemeral container... DONE (1.1s)

$ ls -la /var/log/app.log

-rw-r--r-- 1 root root 1024 Jul 26 /var/log/app.log

$ chmod 664 /var/log/app.log

[+] Permissions updated.