The first thing to do is understanding which ASCII
codes are produced by a certain key using the C
one-liner.
Once you know which sequences are produced, you must check the
current terminfo entry with
infocmp (don't be scared by the amount of information
printed!) and be sure that the kbs and
kdch1 capabilities correspond to the right sequences
(that is, the one produced by the respective keys). Moreover, you must
check with stty -a that the erase character is the one
emitted by the Backspace key (note that
^H represent BS whereas
^? represents DEL).
If there is a mismatch, there can be several different reason: wrong
content of the TERM variable, wrong entry of the terminal
database, wrong terminal emulation under X. I hope at this point you have
enough information to dig the solution autonomously.
 | If different applications behave in different ways, it is likely
that some of them are using the terminal database correctly, and some are
not. Remember that the fact that the keys produce the right behaviour in
a certain application does not mean that the application is using
correctly the terminal database—they could work just by chance. If you
want to have an independent check, you can try whether the
ne
editor works. ne uses all terminal capabilities,
including kbs and kdch1, and uses
intended meaning only as a last resource. |
Take our 
