Skip to main content

Troubleshooting Common Issues

Solutions to frequently encountered problems.

Connectivity Issues​

Can't Connect to VPN​

  • Verify credentials
  • Check VPN client is updated
  • Ensure firewall allows VPN traffic
  • Try different VPN protocol

Can't Access VM via SSH​

  • Confirm VM is running
  • Verify SSH service: sudo systemctl status sshd
  • Check firewall rules
  • Verify IP address is correct

No Internet in VM​

  • Check gateway configuration
  • Verify DNS settings: cat /etc/resolv.conf
  • Test with ping 8.8.8.8
  • Check routing: ip route

VM Issues​

VM Won't Start​

  • Check resource availability
  • Review logs in Xen Orchestra
  • Verify storage isn't full
  • Try reverting to snapshot

VM is Slow​

  • Check CPU/RAM usage
  • Review disk I/O
  • Ensure adequate resources allocated
  • Look for runaway processes

Can't Access Console​

  • Refresh browser
  • Clear browser cache
  • Try different browser
  • Verify VPN connection

System Administration​

Forgot Root Password​

  • Use single-user mode recovery
  • Access via console in XO
  • Follow password reset procedure for your OS

Disk Full​

# Find large files
du -h / | sort -rh | head -n 20

# Clean package cache
sudo apt clean  # Ubuntu/Debian
sudo dnf clean all  # RHEL/Rocky

# Remove old logs
sudo journalctl --vacuum-time=7d

Service Won't Start​

# Check status
sudo systemctl status servicename

# View logs
sudo journalctl -u servicename -n 50

# Check configuration
sudo servicename -t  # nginx, apache

Getting Help​

Quick Commands:

  • sudo systemctl status - check service status
  • journalctl -xe - view system logs
  • ip addr - show IP addresses
  • ss -tulpn - show listening ports