zhizhu
Home / developer-tools / Fix systemd service exit code 203 (exec format error) - How to Enable Real-Time Protection When Blocked-How to Remove SSH Host Keys from known_hosts File

Fix systemd service exit code 203 (exec format error) - How to Enable Real-Time Protection When Blocked-How to Remove SSH Host Keys from known_hosts File

2026-06-13 14:25:06
Fix systemd service exit code 203 (exec format error) - How to Enable Real-Time Protection When Blocked-How to Remove SSH Host Keys from known_hosts File

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.