shell speed/priority

[Chris]

Hi I am looking at a way so that any fg apps I run in the shell are
higher priority then normal and also to make the shell more responsive
during a denial of service attack that saturates cpu.  I would guess
renice on sshd/bash be appropriate but there are numerous processes of
each and if so which ones should I renice.

93898  p2  S      0:00.20 -su (bash)
25726  ??  Ss     0:03.04 /usr/local/sbin/sshd -u0
91543  ??  Ss     0:00.05 sshd: admin [priv] (sshd)

Chris