# Logs

The last lines of the router's logs.

## Sub-tabs

- **Journal:** the systemd journal of one of the router's units, or of all units.
- **Files:** a log file the router lists in its setting `web.log_files`. Files are added on the
  router as root:

  ```sh
  vpn-config-edit set web.log_files /var/log/syslog,/var/log/auth.log
  ```

## Controls

- **Unit** or **File:** the log shown.
- **Lines:** 100, 200, 500 or 1000 of the last lines; the router answers at most 1000 at a time,
  and reads at most the last MiB of a file.
- **Follow:** reads the log every 2 seconds and keeps the view at its last line, as `tail -f`
  does. Refresh is off meanwhile.
- **Refresh:** reads the log again. A log is also read when the unit, the file or the number of
  lines changes.

Older lines stay on the router: `journalctl` and the files themselves, over SSH or the
[Shell](shell.md).