Hi, S. P. Molnar wrote: > comp@AbNormal:~$ trap > ... > comp@AbNormal:~$ echo "$PROMPT_COMMAND" These do not look like they could be the culprit. > comp@AbNormal:~$ alias > alias adt='/home/comp/Apps/MGLTools-latest/bin/adt' > alias l='ls -l --color' > alias ls='ls --color=auto' > alias mopac='/opt/mopac/MOPAC2016.exe' What do you get later, when "l" is not available as alias any more ? Do the others persist or are all gone ? Have a nice day :) Thomas