Hi, I come into unix with csh, but i switch to bash . I want to clear my command history for each session, history -c, but for some reason this doesn't work in the .bashrc file. I know that the file is running after I type bash on my csh command line because I get the hello back. If I am already in bash and type source .bashrc, then it will work perfectly. What's going on?

#.bash
set -o vi
PS1="\H"\.ba."\!"\>
history -c
source .aliases
echo HELLO

As I understand it, history -c clears the history from the shell environment. It does not clear the .bash_history file. It probably clears the environment variable and then re-reads the .bash_history file as the last step.
Use history -w to overwrite the .bash_history file with the current environment. You can also use history -cw to clear the shell history and then overwrite the .bash_history file.

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