ADD Troubleshooting with password

partdb-install.md

@@ -454,4 +454,17 @@ server {
 }
 ```
 
+## Troubleshooting
+
+### Password of the admin, login failed
+
+I tried to change the password for the admin, using a passphrase like:
+`ensnare flaccid backslid DECIDABLE morphine sturdily charting`
+
+But a new login didn't work any more, I had to reset the admin password, switching to the site via SSH and cd to /var/www/partdb
+
+```
+sudo -u www-data php bin/console app:set-password admin
+```
+
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