Troubleshooting

Something is broken on purpose — diagnose it and put it right.

5 challenges · 1 easy · 3 medium · 1 pro

• Report free spaceeasy
  Write the filesystem use percentage of / (just the number, no %) to /home/player/p.txt.
• Count processesmedium
  Several background `sleep` worker processes were started on this box. Count how many processes named `sleep` are currently running and write just that number to /home/player/n.txt.
• Find and delete by patternmedium
  Delete every *.tmp file anywhere under /var/work (keep other files).
• Replace a config valuemedium
  In /etc/app/app.conf change the line `mode=dev` to `mode=prod` (leave other lines).
• Restore from a backuppro
  Disaster: /var/app was wiped. A backup exists at /opt/app-backup.tgz. Restore it so /var/app/config.yml exists and contains the line: ready: true