1) You can increase the lines contained in bash's history file by setting HISTFILESIZE to a bigger value. To see the current, use echo $HISTFILESIZE and to set it: export HISTFILESIZE=1000
2) You can change the background color using terminal parameters, that may vary on the term you're using, check it's man page to see which value you've to pass to it.
3) I've used ATerm before but switched to ETerm, both are good , support transparencies and work in Slackware.
4) Try su - instead to load enviroment values when changing to root, but as far as I know, /root is not included in default path (you can change root's profile or bashrc file to include it).
Edit, with your first question, where you asking about the lines above you can see when you use the vertical scrollbar? That also depends on the term you're using.
Last edited by gbonvehi; 05-29-2005 at 04:30 PM.