In /etc is a file named mtab. It appears that each time a 'mount -t ...' command is issued the number of lines in this file grows by the number of devices mounted. After many reboots, the file is quite large. Whenever I use the 'df' or 'mount' (list only) command it lists every line in the mtab file. This means the same mount points are repeated in the list over and over. This list grows over time; they even scroll off the page after a while.
Is this expected behavior? For each unique device shouldn't there be only a single line in the 'df' or 'mount' output?
Demonstrated in attached log file