matthiasblaesing commented on issue #3878:
URL: https://github.com/apache/netbeans/issues/3878#issuecomment-2272029894

   My understanding is, that the issue is about this dialog and the list of 
username/host pairs in the dropdown list:
   
   
![image](https://github.com/user-attachments/assets/03dbe2aa-41eb-459c-9c48-c4daa3fddc46)
   
   that dialog can be invoked from the terminal window tab:
   
   
![image](https://github.com/user-attachments/assets/261dd289-91d3-4cde-9302-cc14f74ab090)
   
   That list is not associated with the ssh `known_hosts` file. The code that 
manages that list can be found here:
   
   
https://github.com/apache/netbeans/blob/35028307bd8398a357fdc19cc76d79d07c0307d9/ide/dlight.nativeexecution/src/org/netbeans/modules/nativeexecution/api/util/ConnectionManager.java#L187-L224
   
   Indeed there is no size limit.
   
   As a work around the file 
`$NETBEANS_CONFIGDIR/config/Preferences/org/netbeans/dlight/nativeexecution.properties`
 can be manually edited. The entries with the prefix 
`org.netbeans.modules.nativeexecution.api.util.ConnectionManager_connection.history`
 are the history entries. The entries with the prefix 
`org.netbeans.modules.nativeexecution.api.util.Authentication_` prefix hold the 
authentication information for the entry.


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